Independent Β· sells nothing Β· takes no vendor money Β· re-checked daily
The Peptide Watch: check your peptide supplier before you buy
The Peptide Watch is an independent UK watchdog that checks whether research-peptide sellers publish their own verifiable Janoshik certificate of analysis. Of 379 active UK vendors audited as of 16 September 2026, only 28 (7%) pass this check and 351 do not.
Type any UK peptide seller and get an instant verdict on whether it holds up. Searches are counted anonymously so we know which sellers to audit next: no cookie, no account, nothing stored against you. How that works.
379active UK vendors
(from 523 sites audited)
(from 523 sites audited)
28independently tested
351on the watch list
π Most-checked UK vendors this week: π© Lucid Peptides reviewπ© Nilah Labs reviewπ© Tidelabs reviewThe vendor pages UK buyers are checking most on Google right now. β
publishes a verified own-name COA Β· π© on the watch list.
π Key finding: just 7% of active UK research-peptide sellers (28 of 379) publish their own verifiable independent lab certificate. The other 93%, 351 sellers, show none, a borrowed one, a self-made one, or one you can't check.
The 28 whose testing you can verify, newest certificate first: Lab77Peptides, Imperialpeptides, Regenix Peptides, Apex Pharma, Claripep, Novex Labs, Peptide Biosciences, Biohacklondon, Velonix Labs, Liverpool Advanced Biosciences (LAB.LTD), Grey Matter Peptides, Kingston Peptides, Simplypeptides, Kensingtonlabs, Reta24, Intel Peptides, BioVanta Research, Phoenixbiolabs, Peptideprime, Peptidesresearch, Peptifyuk, Momentumpeptides, Unionbiolabs, Xlpeptides, Bodylab Store, Ascendpeptidesuk, Tested Peptides, Wolverinepeptides. See each with its verify link →
We open the certificate each UK seller publishes, check who actually tested it and whose name is on it, and tell you plainly whether it stands up. Search any supplier above, or browse the full lists below.
Last updated 16 September 2026 Β· every UK research-peptide retailer Β· re-checked daily
There is no peptide-testing lab in England, so how is everyone "testing"?
An untested vial could be the wrong compound, a fraction of the stated dose, or contaminated with heavy metals or endotoxins, and price, packaging and a slick website prove none of it. Which is why testing matters, and where it gets awkward. Every genuine certificate in this audit was issued abroad, by Janoshik in Prague, or Analiza in Poland. Not one verified report came from a UK laboratory. So when a British shop says its peptides are checked by an "accredited UK lab" it never names, one question has an awkward answer: which lab? There isn't one. The vendors that genuinely test send a sample to Janoshik and show you the verifiable result; an unnamed "UK lab" usually means nothing was independently tested at all.
You can watch it being invented. Take ukpeptides.org: it credits its testing to a lab called "Chromate Analytics." Search for it and you find no website, no listing, no independent trace anywhere, the "lab" exists only as a name on this seller's own documents. A made-up lab is not testing; it is theatre.
What this can, and can't, tell you
Be clear about what any site like this can do. No website, including The Peptide Watch, can prove what is actually in the vial that arrives at your door. That would take independently testing the exact unit you receive, and no document can stand in for it. What we can do is judge the evidence a seller puts in front of you: whether a real independent laboratory tested it, whether the certificate names the seller itself, and whether you can verify it. Even a flawless certificate only proves a sample was tested once, not that your batch matches it. So treat The Peptide Watch as the strongest paper-trail filter available: a way to move from guesswork to informed scepticism, weighed alongside independent testing and consistent results over time, not a guarantee.
Independently tested: vendors with their own verifiable Janoshik certificate (28)
Ranked by most recent certificate. These are the only UK vendors whose testing names them as the client and can be verified on Janoshik's website. Re-scanned daily, so a newer batch moves a vendor up. Click the lab name to open that vendor's live certificate check. Price compares each vendor's BPC-157 cost per mg with the market average; cheaper does not mean better tested.
| # | Vendor | Lab Β· verify | Latest COA | COA age | Price vs market |
|---|---|---|---|---|---|
| 1 | Lab77Peptides lab77peptides.uk | Janoshik β | Aug 2026 | 2 mo | 17% below avg |
| 2 | Imperialpeptides imperialpeptides.co.uk | Janoshik β | Aug 2026 | 2 mo | market avg |
| 3 | Regenix Peptides regenix-peptides.co.uk | Janoshik β | Aug 2026 | 2 mo | market avg |
| 4 | Apex Pharma apex-pharma.co.uk | Janoshik β | Jul 2026 | 3 mo | n/a |
| 5 | Claripep claripep.co.uk | Janoshik β | Jul 2026 | 3 mo | n/a |
| 6 | Novex Labs novexlabs.co.uk | Janoshik β | Jul 2026 | 3 mo | n/a |
| 7 | Peptide Biosciences peptide-biosciences.com | Janoshik β | Jun 2026 | 4 mo | n/a |
| 8 | Biohacklondon biohacklondon.com | Janoshik β | Jun 2026 | 4 mo | n/a |
| 9 | Velonix Labs velonixlabs.co.uk | Janoshik β | Jun 2026 | 4 mo | n/a |
| 10 | Liverpool Advanced Biosciences (LAB.LTD) lab.ltd | Janoshik β | Jun 2026 | 4 mo | n/a |
| 11 | Grey Matter Peptides greymatterpeptides.co.uk | Janoshik β | Jun 2026 | 4 mo | n/a |
| 12 | Kingston Peptides kingstonpeptides.com | Janoshik β | Jun 2026 | 4 mo | n/a |
| 13 | Simplypeptides simplypeptides.co.uk | Janoshik β | May 2026 | 5 mo | 20% below avg |
| 14 | Kensingtonlabs kensingtonlabs.co.uk | Janoshik β | May 2026 | 5 mo | market avg |
| 15 | Reta24 reta24.co.uk | Janoshik β | May 2026 | 5 mo | n/a |
| 16 | Intel Peptides intelpeptides.com | Janoshik β | May 2026 | 5 mo | n/a |
| 17 | BioVanta Research biovantaresearch.com | Janoshik β | May 2026 | 5 mo | n/a |
| 18 | Phoenixbiolabs phoenixbiolabs.net | Janoshik β | May 2026 | 5 mo | 50% below avg |
| 19 | Peptideprime peptideprime.co.uk | Janoshik β | May 2026 | 5 mo | 40% below avg |
| 20 | Peptidesresearch peptidesresearch.uk | Janoshik β | May 2026 | 5 mo | market avg |
| 21 | Peptifyuk peptifyuk.com | Janoshik β | May 2026 | 5 mo | 10% below avg |
| 22 | Momentumpeptides momentumpeptides.com | Janoshik β | May 2026 | 5 mo | 20% above avg |
| 23 | Unionbiolabs unionbiolabs.com | Janoshik β | Apr 2026 | 6 mo | market avg |
| 24 | Xlpeptides xlpeptides.com | Janoshik β | Apr 2026 | 6 mo | 7% below avg |
| 25 | Bodylab Store bodylabstore.co.uk | Janoshik β | Apr 2026 | 6 mo | n/a |
| 26 | Ascendpeptidesuk ascendpeptidesuk.com | Janoshik β | Apr 2026 | 6 mo | market avg |
| 27 | Tested Peptides testedpeptides.co.uk | Janoshik β | Jan 2026 | 8 mo | n/a |
| 28 | Wolverinepeptides wolverinepeptides.co.uk | Janoshik β | no own-name report read | n/a | n/a |
The independently-tested vendors, in detail
A short, factual profile of each independently-verified vendor, what its Janoshik certificate shows and why it qualifies. Each is checked in the vendor's own name and verifiable on Janoshik's website.
1. Lab77Peptides lab77peptides.uk
Lab77 Peptides publishes its own-name Janoshik certificates, for example tests #208427 (BPC-157 at 98.329%, batch L77BPC268) and #208428 (TB-500 at 99.020%, batch L77TB268), both sampled 3 August 2026, which name Lab77peptides.co.uk as the client and can be verified on Janoshik's website. It holds the most recent verified certificate in this index, so it sorts first in a list ranked by certificate date.
2. Imperialpeptides imperialpeptides.co.uk
Imperial Peptides publishes its own Janoshik certificates naming Imperial Peptides UK as the client, 64 verifiable reports in all. The newest, task #214255 (TB-500 5mg, analysed 6 August 2026), reports 98.750% purity, with endotoxin and heavy-metal reports for the same batch alongside it.
3. Regenix Peptides regenix-peptides.co.uk
Regenix Peptides (regenix-peptides.co.uk) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated Aug 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
4. Apex Pharma apex-pharma.co.uk
Apex Pharma (apex-pharma.co.uk) publishes its own Janoshik certificate of analysis, the report names Apex Pharma as the client, so it covers the stock Apex Pharma actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated Jul 2026. Apex Pharma is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
5. Claripep claripep.co.uk
Claripep publishes one own-name Janoshik certificate: task #210212, GHK-Cu, batch GHKCU-2608-01 (labelled CLP-GHK-001 on the site), analysed 30 July 2026, 99.682% purity, which names Claripep as both client and manufacturer and verifies on Janoshik's website. No other product on the site carries a report, and the company was incorporated on 18 June 2026.
6. Novex Labs novexlabs.co.uk
Novex Labs publishes one own-name Janoshik certificate, test #203970 (retatrutide at 99.895%, 22.35 mg recovered, batch NVX-001, analysed 17 July 2026), which names Novex Labs as the client and verifies on Janoshik's website. It covers that single batch of the 20 mg vial; the 40 mg vial and pen kit have no published report.
7. Peptide Biosciences peptide-biosciences.com
Peptide Biosciences (peptide-biosciences.com) publishes its own Janoshik certificate of analysis, the report names Peptide Biosciences as the client, so it covers the stock Peptide Biosciences actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated Jun 2026. Peptide Biosciences is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
8. Biohacklondon biohacklondon.com
Among UK research-peptide suppliers, Biohacklondon (biohacklondon.com) is independently verified: it commissions its own testing from Janoshik Analytical, with Biohacklondon named as the client and a unique code that can be confirmed on janoshik.com. Its most recent certificate in its own name is dated Jun 2026.
9. Velonix Labs velonixlabs.co.uk
Velonix Labs publishes its own Janoshik certificates, for example test #193734 (GHK-Cu 100mg, analysis 23 June 2026), which names Velonix Labs as the client and velonixlabs.co.uk as the manufacturer, batch VLX, at 99.644% purity, verifiable on Janoshik's website with the key GJ7KE6CC1HJB. (Its other published certificates are for GLP-1 compounds, which this index does not list.)
10. Liverpool Advanced Biosciences (LAB.LTD) lab.ltd
Liverpool Advanced Biosciences (LAB.LTD) (lab.ltd) publishes its own Janoshik certificate of analysis, the report names Liverpool Advanced Biosciences (LAB.LTD) as the client, so it covers the stock Liverpool Advanced Biosciences (LAB.LTD) actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated Jun 2026. Liverpool Advanced Biosciences (LAB.LTD) is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
11. Grey Matter Peptides greymatterpeptides.co.uk
Among UK research-peptide suppliers, Grey Matter Peptides (greymatterpeptides.co.uk) is independently verified: it commissions its own testing from Janoshik Analytical, with Grey Matter Peptides named as the client and a unique code that can be confirmed on janoshik.com. Its most recent certificate in its own name is dated Jun 2026.
12. Kingston Peptides kingstonpeptides.com
Kingston Peptides (kingstonpeptides.com) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated Jun 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
13. Simplypeptides simplypeptides.co.uk
Simplypeptides (simplypeptides.co.uk) publishes its own Janoshik certificate of analysis, the report names Simplypeptides as the client, so it covers the stock Simplypeptides actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated May 2026. Simplypeptides is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
14. Kensingtonlabs kensingtonlabs.co.uk
Kensington Labs publishes its own Janoshik certificates naming Kensington Labs as both client and manufacturer. The newest we verified is task #121930 (CJC-1295 no DAC 5mg, analysed 5 May 2026) at 99.625% purity, alongside #121926 (GHK-Cu 50mg) from the same order; the site carries 30 or more Janoshik reports going back to 2025.
15. Reta24 reta24.co.uk
Reta24 (reta24.co.uk) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated May 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
16. Intel Peptides intelpeptides.com
Intel Peptides (intelpeptides.com) publishes its own Janoshik certificate of analysis, the report names Intel Peptides as the client, so it covers the stock Intel Peptides actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated May 2026. Intel Peptides is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
17. BioVanta Research biovantaresearch.com
BioVanta Research publishes three own-name Janoshik certificates, tests #153876 (retatrutide 5 mg at 99.641%, 5.49 mg recovered), #153880 (tirzepatide, batch TRZ-653ST) and #153888 (cagrilintide, batch CGR-274HJ), samples received 19 May 2026, which name Biovanta Research as client and manufacturer and verify on Janoshik's website.
18. Phoenixbiolabs phoenixbiolabs.net
Phoenixbiolabs (phoenixbiolabs.net) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated May 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
19. Peptideprime peptideprime.co.uk
Peptide Prime commissions its own Janoshik testing: its lab-results pages show reports such as #151111-#151116 (May 2026) naming Peptide Prime as the client, with purities around 99.6-99.8%.
20. Peptidesresearch peptidesresearch.uk
BluePeak Peptides publishes own-name Janoshik certificates for three compounds: BPC-157 (task #152764, 99.817%, analysed May 2026), retatrutide (#152765) and GHK-Cu (#152766), each naming Blue Peak Peptides as the client and verifiable on Janoshik's website. Those three are all the verified status covers, because no independent certificate is published for its other products. It also measures only whether the lab evidence can be checked, not dispatch, delivery or refunds, on which this page records a recent pattern of customer reports.
21. Peptifyuk peptifyuk.com
Peptifyuk (peptifyuk.com) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated May 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
22. Momentumpeptides momentumpeptides.com
Momentumpeptides (momentumpeptides.com) publishes its own Janoshik certificate of analysis, the report names Momentumpeptides as the client, so it covers the stock Momentumpeptides actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated May 2026. Momentumpeptides is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
23. Unionbiolabs unionbiolabs.com
Among UK research-peptide suppliers, Unionbiolabs (unionbiolabs.com) is independently verified: it commissions its own testing from Janoshik Analytical, with Unionbiolabs named as the client and a unique code that can be confirmed on janoshik.com. Its most recent certificate in its own name is dated Apr 2026.
24. Xlpeptides xlpeptides.com
Xlpeptides (xlpeptides.com) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated Apr 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
25. Bodylab Store bodylabstore.co.uk
Bodylab Store publishes its own Janoshik certificate, test #150821 (BPC-157, 17 April 2026) reports 99.4% purity and names Bodylab Store as the client (verification key VUNS4KWPCKSY). It also publishes Analiza BiaΕek reports for other products.
26. Ascendpeptidesuk ascendpeptidesuk.com
Among UK research-peptide suppliers, Ascendpeptidesuk (ascendpeptidesuk.com) is independently verified: it commissions its own testing from Janoshik Analytical, with Ascendpeptidesuk named as the client and a unique code that can be confirmed on janoshik.com. Its most recent certificate in its own name is dated Apr 2026.
27. Tested Peptides testedpeptides.co.uk
Tested Peptides (testedpeptides.co.uk) is one of the 28 UK research-peptide vendors with a verifiable own-name Janoshik COA. Its most recent certificate in its own name is dated Jan 2026. Because every Janoshik report carries a code checkable on janoshik.com, the purity result cannot be faked or edited.
28. Wolverinepeptides wolverinepeptides.co.uk
Wolverinepeptides (wolverinepeptides.co.uk) publishes its own Janoshik certificate of analysis, the report names Wolverinepeptides as the client, so it covers the stock Wolverinepeptides actually sells, and it can be checked on Janoshik's website. Its most recent certificate in its own name is dated no own-name report read. Wolverinepeptides is one of only 28 UK research-peptide vendors, out of 523 audited, that meet this standard.
πΈ The hidden networks: many "rival" shops are one operator
Shopping around feels safe, until the "other" shops turn out to be the same person. These storefronts look independent but share a registered address, a parent company, or the same tracking pixel, so a buyer comparing them is comparing one operator to itself. 13 clusters are visible in the public record, the largest spanning 4 brands from a single address.
4 brands Β· one operator
π registered to the same address, 195-197 Wood Street, London E17
3 brands Β· one operator
π the same company, Research Sciences Ltd (Companies House 16704368, formerly Imperial Peptides Ltd and Imperial Sciences Ltd), runs both
3 brands Β· one operator
π same company, Midshire Labs Ltd (formerly Regen Peptides Ltd / Regeneration Labs Ltd); regenpeptides.co.uk now 301-redirects to this domain
2 brands Β· one operator
biolabshop.co.ukmybiolabshop.com
π a shared Facebook pixel, Google Analytics tag, WhatsApp number and contact emails
2 brands Β· one operator
medimaxpeptides.compulsepeptides.co.uk
π the same registered address (82a James Carter Road); now Evo-Max Ltd and Bio Pulse Prime Ltd
2 brands Β· one operator
britpeptides.co.uknovapeptide.co.uk
π a shared Facebook tracking pixel (same operator)
2 brands Β· one operator
nupex.co.ukresearchscientific.co.uk
π both are Research Scientific Ltd (Companies House 16181281)
2 brands Β· one operator
π both trade as Apex Peptides (shared brand, UK phone, GBP pricing)
2 brands Β· one operator
armapeptides.comarmapeptideshop.com
π same trading name Arma Peptides; armapeptides.com no longer resolves, armapeptideshop.com is the current live storefront
2 brands Β· one operator
π both are Axiom Research Peptides Ltd (Companies House 17240005)
2 brands Β· one operator
peptidevault.co.ukprestigepeptides.co.uk
π shares 82/82a James Carter Road, Mildenhall IP28 7DE with Prestige Peptides (and New Wave at 84)
2 brands Β· one operator
leolab.uktirzepatide.uk
π same brand ('Leo Lab'); leolab.uk unreachable at verification time, tirzepatide.uk is the live storefront
β Read the full hidden-networks report
Watch list: active sellers without a verifiable Janoshik COA (351)
Real UK peptide shops, but none publish a certificate that can be verified in their own name. Each entry states the observable reason its certificate can't be relied on, open any one's full audit for the teardown. Tap a tag to filter by problem type.
Shows a supplier's certificate, not its own 21
Alphamino the Alphamino site claims 'Where third-party testing is complete, we publish a Certificate of Analysis (COA), often via independent analysis through Janoshik'. The certificate on display names a different company as the client, so it belongs to a supplier's sample rather than this seller's stock. A certificate that names someone else as the client proves a sample from that supplier's line, not the vial you are sent. On the certificate it shows, the client is recorded only as 'Anonymous', not Alphamino.
We opened its Janoshik verify link (task #156960) on Janoshik's own server: the CLIENT and MANUFACTURER are 'utherpeptide.com', its supplier, not Astralabs. Retatrutide 10mg at 99.793%, batch RE10-0501. Astralabs publishes 8 Janoshik links, all with Uther Peptide as the client, the same supplier as omni-peptides.com. This is a borrowed supplier certificate, so it proves the supplier's sample, not this reseller's stock.
Direct Peptides UK β Don't trust their 'COA'. UK-facing Shopify site (GBP pricing, free UK tracked delivery), distinct from the other "Direct Peptides"-named domains already tracked (different platform, different operator; the site itself states it is not affiliated with similarly-named businesses). Its "Test Certificates" page publishes real Janoshik reports (task numbers, QR codes, e.g. #150788, #150822), but the client and manufacturer named on every one is "Sulan", not Direct Peptides UK, and the site itself warns a published report is "not confirmation of the batch currently being supplied". No Companies House number disclosed anywhere on the site.
King Pharma sells 'laboratory-grade peptide compounds' for research use and, unusually, publishes an open COA library of genuine Janoshik Analytical reports (one, for CJC-1295, verifies as Janoshik test 74431). However, those certificates carry no client name, the sample-submitted-by field is blank, and King Pharma's own page states products are 'independently tested and verified by Singapore Hengtai Industrial Co', its manufacturer. A verifiable Janoshik report with no client name is the factory's batch test displayed by the reseller, not a certificate commissioned in King Pharma's own name, so it does not establish that a given vial you receive matches that batch.
Lucid Peptides update, 11 September 2026: Lucid Peptides' homepage now carries a 'Product Availability Update' saying that, following correspondence from the MHRA (the UK medicines regulator) and a review of its catalogue, certain peptide products have been removed from sale and are no longer available. It does not say which products or when, and we have not seen the MHRA's correspondence itself; this records only what Lucid's own site states. Checked 6 September 2026 in the browser: the Verify Batch tool returned a Lucid-branded 'Internal Batch Record' for LP-RT15-220726 (Retatrutide 15mg, 99.515%, 16.70mg, analysis date 22-07-2026, 'Generated by Lucid Peptides QC Module') citing Janoshik task #202682. Janoshik's server confirms the test exists and names BBA as client and manufacturer, batch 'Unknown', sample received 15 July 2026. That is the borrowed-certificate pattern with a more polished wrapper than most: the report is real and verifiable, the name on it is not Lucid's. A buyer who wants Lucid's own stock tested should look for a Janoshik report whose client field reads Lucid Peptides.
MMpeptides verified directly on verify.janoshik.com on 4 September 2026. Of every borrowed certificate in this index this is the weakest: a genuine lab report whose client is a free anonymous email account, with an unidentified manufacturer and no batch number, dated August 2025. It cannot be tied to MMpeptides, to a manufacturer, or to a production run.
Midshire Labs midshirelabs.co.uk is the live, current-branded storefront for the same operator already audited here as regenpeptides.co.uk, that domain now 301-redirects to this one (confirmed 3 September 2026). See the regenpeptides.co.uk record for the full evidence trail: Companies House 16443319, Trustpilot reviewers alleging the COAs are taken from other sites, and the operator's own reply confirming the Janoshik certificates are third-party rather than self-tested. Added as its own coverage page because the brand name people now search is Midshire Labs, not Regen Peptides.
πΈ Same operator as regenpeptides.co.uk, regenlabs.co.uk, same company, Midshire Labs Ltd (formerly Regen Peptides Ltd / Regeneration Labs Ltd); regenpeptides.co.uk now 301-redirects to this domain.
My Reta checked 11 September 2026. The site says every batch it stocks is sent to Janoshik or 'TrustPointe Analytics' before sale, but the only Janoshik reports it publishes were commissioned by Apex Pharma.io (batches 002/26 and 003/26, samples received 4 February 2026) and are now seven months old. Its COA page also lists a 'Genesis Retatrutide' batch tested by TrustPointe Analytics (a US laboratory) at 99.632% and a Genesis Labs figure of 99.430%, neither with a verification link. The 'Retaklik 2.0' pen, described as 'Retalintide + Retatrutide, 44 mg', has no certificate at all, and we could not match 'Retalintide' to a recognised compound name. The site says My Reta is a trading name of 'CCwithAI', a UK company; we found no company of that name at Companies House. Domain registered 18 March 2026. Trustpilot shows 4.7 from 39 reviews, 38 of them five-star; the one-star review, dated 5 September 2026, says the product had no effect, and the company's public reply calls it a fake review from a competitor. The report client name matches a verified UK shop, Apex Pharma (apex-pharma.co.uk), whose own report names apex-pharma.co.uk as manufacturer; the reports here say 'Apex Pharma.io' instead, and we have not established whether the two are connected.
Neoviapeptides's product pages read 'Each COA is produced by independent HPLC-MS testing and confirms purity (β₯99%), mass spectrometry results and sequence identity'. The certificate on display names a different company as the client, so it belongs to a supplier's sample rather than this seller's stock. Testing paid for by a supplier says nothing checkable about this seller's own stock. The client printed on that certificate is liyudaily.com (a Chinese factory), not Neoviapeptides.
We opened its Janoshik verify link (task #84742) on Janoshik's own server: the CLIENT and MANUFACTURER are 'beibangan.com', its supplier, not Nova Peptides. A GLOW blend (GHK-Cu, BPC-157, TB-500), Oct 2025. The blend name is Nova's own, but the certificate client is the supplier beibangan.com. This is a borrowed supplier certificate, so it proves the supplier's sample, not this reseller's stock.
Omni Peptides confirmed on verify.janoshik.com on 4 September 2026 across more than one report: task #109575 (retatrutide 30mg, batch RE30-0208, Feb 2026) and task #122187 (NAD 500, batch NA500-0306, Mar 2026) both name utherpeptide.com as client AND manufacturer. It is the same supplier's paperwork reused across compounds, not a one-off mislabel. Separately, three of the verify links it publishes (tasks #122189 GHK 100mg, #123350 MOTS-c 40mg, #125013 GLOW) omit the unique key Janoshik requires, so they redirect to a blank page: checked 6 September 2026. A buyer clicking 'verify' on those products cannot verify anything. The links look like proof and function as decoration.
Opti-Gen Peptides checked 11 September 2026. Opti-Gen Peptides Ltd was incorporated on 18 August 2026 (Companies House 17405647) at 66 Paul Street, London EC2A 4NA, a registered-office address used by many unrelated companies, and the domain dates from 24 July 2026: every certificate it shows predates the business. Two GHK-Cu reports come from uzorak.com, a laboratory in south-east Europe. Orders via WhatsApp.
Owsa Labs checked 11 September 2026. The certificates were commissioned six months before Owsa's domain existed (registered 1 August 2026). The site names no company or address and lists several products as 'not yet published' on its certificate page. Payment method not recorded.
Peptidexofficial advertises 'Every compound is verified at two levels: independently by Janoshik (accredited third-party lab) and by our supplier's own accredited laboratory'. The document behind 'accredited lab' was issued to someone else, not to this seller, so it says nothing checkable about the vial you receive. A certificate that names someone else as the client proves a sample from that supplier's line, not the vial you are sent. The client printed on that certificate is InnoPeptide (a US manufacturer), not this seller.
Raccoonpeptides the Raccoonpeptides site claims 'Our peptides are independently lab-tested for purity using industry-standard methods such as HPLC and mass spectrometry'. The certificate on display names a different company as the client, so it belongs to a supplier's sample rather than this seller's stock. A certificate that names someone else as the client proves a sample from that supplier's line, not the vial you are sent. The client printed on that certificate is Uther Peptide, not Raccoonpeptides. It also runs contact/orders through WhatsApp.
πΈ Same operator as anglopeptides.co.uk, anglopeptides.com, raccoonpeptides.co.uk, registered to the same address, 195-197 Wood Street, London E17.
Red Panda Peptides β UK-facing: GBP pricing (Β£45.99βΒ£71.99), "Fast UK dispatch" via Royal Mail Tracked 24. Relies on supplier-provided CoAs rather than its own lab testing, and states plans for future independent UK lab testing not yet in place. No company name or Companies House number disclosed on site; independently checked, no genuine Companies House match found under this trading name.
Regenlabs markets its stock with the line 'We work exclusively with trusted international suppliers who provide high-purity peptides, including third-party batch testing and consistent quality'. The document behind that claim was issued to someone else, not to this seller, so it says nothing checkable about the vial you receive. Testing paid for by a supplier says nothing checkable about this seller's own stock. The certificates on display name a rotating cast of unrelated companies as the client. It also recycles copy/templates shared with other 'brands'.
πΈ Same operator as regenpeptides.co.uk, the same company, Midshire Labs Ltd (formerly Regen Peptides Ltd / Regeneration Labs Ltd), same address.
Regenpeptides shows a genuine Janoshik report to look legitimate, but the certificates on display name a rotating cast of unrelated companies as the client, not Regenpeptides. In other words it has never paid to test its own stock; it has taken a certificate that proves a sample from its supplier's own line, and presents it as proof of what's in the vial it ships. The buyer is shown real-looking science that is, for their purposes, meaningless, there is no link between that certificate and the product they receive.
πΈ Same operator as regenlabs.co.uk, the same company, Midshire Labs Ltd (formerly Regen Peptides Ltd / Regeneration Labs Ltd), same address.
Research Sciences checked 11 September 2026: imperialsciences.co.uk now redirects here. Companies House confirms Research Sciences Ltd (16704368) was previously named Imperial Peptides Ltd and Imperial Sciences Ltd. The site links seven Janoshik reports, Tesamorelin 5mg and bacteriostatic water (#99744-#99747) and MT1 10mg (#113086-#113088); an earlier check found each names Imperial Peptides UK as the client. That is the same operator's other brand, which holds its own verified certificates, but it is not a certificate issued to this shop.
πΈ Same operator as imperialpeptides.co.uk, the same company, Research Sciences Ltd (Companies House 16704368, formerly Imperial Peptides Ltd and Imperial Sciences Ltd), runs both.
UK Peptide Supply (.org) verified directly on verify.janoshik.com on 8 September 2026, after eight sessions in which no browser was available to read the client fields. The six spot-checks, spanning the full April 2025 to June 2026 range of the links it publishes: task #163538 (BPC-157 10mg) and #163541 (MOTS-c 40mg) both name Body Bio Hacking as the client, with the manufacturer recorded only as 'H' and no batch number; #103740 (KLOW) and #103741 (GLOW) name the email address [email protected], with manufacturer and batch both 'Unknown'; #94405 (Cartalax 20mg) names utherpeptide.com; and #63320 (Semaglutide 15mg) names oupeptide.com. Four separate owners, zero own-name reports. This is the most elaborate borrowed-certificate wall in the index and volume is doing the persuading: eighteen verifiable links invite a buyer to spot-check one, find it genuine, and assume the rest cover this seller's stock. Two of the four owners (utherpeptide.com, oupeptide.com) are known wholesalers that supply many UK resellers, so the same reports appear on other shops too.
Ukpeptides verified directly on verify.janoshik.com on 4 September 2026: task #199541 names Adaptog Research & Life Sciences in both the client and manufacturer fields. A borrowed certificate is a stronger claim than no certificate at all, so this is the more serious finding: a buyer seeing a real Janoshik report on the page would reasonably assume it covers UK Peptides' own stock, and it does not.
Anonymous / not its own 1
Leolab was treated as Janoshik until the certificate was read properly, the client is 'Anonymous' or another brand, not Leolab, so it is not its own verified test.
Name-drops Janoshik with nothing behind it 10
Benchmark Peptides checked 11 September 2026. Benchmark Peptides Ltd was incorporated on 15 July 2026 (Companies House 17342129, Hampshire), four days after the domain was registered. Orders and support run through WhatsApp; payment method not recorded.
Bionikpeptides leans on the Janoshik name in its copy, sometimes a paragraph copy-pasted word-for-word across several 'different' shops, but provides no actual certificate, task number or verification link. It is renting Janoshik's reputation without ever having used them in a way you can check. Aggravating: recycles copy/templates shared with other 'brands'.
Corix Research Labs (Corix Research Labs UK Limited, Companies House 15270634, incorporated November 2023, Louth) runs a genuine UK shop selling BPC-157, TB-500, GHK-Cu, AOD-9604 and similar at GBP prices. Its /third-party-testing page names Janoshik Analytical and states every batch is externally tested, but that page is narrative only: it displays no certificate, and the individual product pages, checked directly, show no Janoshik report, no batch identifier and no verification code. A named lab in prose is not the same as a published, verifiable certificate in the seller's own name, so nothing about a given batch can currently be confirmed.
Helix Research Labs checked 10 September 2026 across the Quality, About and Contact pages: the same placeholder registration details appear on every page, alongside a Manchester contact address. A real Janoshik report carries a task number and a unique key that anyone can check on Janoshik's own site; naming the lab without publishing one gives a buyer nothing to verify. Visitors to The Peptide Watch searched for this brand three times in a week before this audit was written.
Pepspan Ltd (Companies House 17144153, London) prominently names Janoshik Analytical and shows a 'Janoshik COA Verified' badge, but when we opened its Purity Reports page every single product read 'Current Batch: Pending first shipment, report available upon first batch analysis', with no certificate behind any of them, and the store itself is not trading (every product is 'Notify me', not add-to-cart). So it is a pre-launch site advertising testing it has not yet done. It also prices in euros and ships from an EU warehouse despite the UK registration. If and when it publishes a genuine own-name Janoshik certificate we can verify, we will reassess.
Peptidal (Peptidal Ltd, Companies House 16666664, incorporated August 2025, Newcastle upon Tyne) is a real UK shop selling BPC-157, TB-500, ipamorelin and GHK-Cu at 22 to 26 pounds with Royal Mail delivery. It states 'third-party testing through Janoshik, BPC-157 has been submitted, results to be published shortly', and that in the meantime 'all products can be supplied with manufacturer batch Certificates of Analysis upon request'. So the independent Janoshik testing in Peptidal's own name is not yet published, and the current documentation is the manufacturer's, on request. Worth re-checking once the Janoshik results actually appear.
Polygonpeptides leans on the Janoshik name in its copy, sometimes a paragraph copy-pasted word-for-word across several 'different' shops, but provides no actual certificate, task number or verification link. It is renting Janoshik's reputation without ever having used them in a way you can check. Aggravating: barely a functioning shop.
Purity Peptides (a .clinic domain, but a research-peptide shop rather than a treatment clinic) sells tirzepatide, retatrutide, cagrilintide and other GLP-1 compounds with next-day UK delivery. It brands itself heavily as 'JANOSHIK VERIFIED', says 'every batch is independently analysed by Janoshik Laboratories', and claims '99.8%+ purity guaranteed', yet the same page states the certificate 'is on request', and no certificate, batch identifier or Janoshik verification link is actually published. Prominent lab branding with the evidence held back 'on request' cannot be independently verified. No company number is shown; contact is via [email protected].
SPX Labs checked 15 September 2026. The domain was registered on 1 September 2026 and every product page says the shop is 'preparing for launch' with ordering unavailable, so it is not yet trading. Every cited analysis predates the domain by five months or more, which means the tests were commissioned before this shop existed; who the laboratory printed as client is unknown until a report can be opened. The terms, privacy and contact pages name no company and no registration number, and Companies House lists no SPX Labs; the only address is a Belfast correspondence address (Office 2057, 92 Castle Street, BT1 1HE) marked 'not a returns address'. SPX Labs emailed us on 15 September 2026 asking to be audited. What would move this listing: a link that opens each cited report on verify.janoshik.com with SPX Labs printed as the client.
Zenic Labs (zeniclabs.co.uk, registered 27 May 2026, no Companies House entry) sells BPC-157, TB-500, CJC-1295, Ipamorelin and more with GBP pricing and next-day UK delivery, and headlines Janoshik as its trust signal ('verify it yourself'). But its /verify and /lab-results pages list nine in-house lot codes all marked 'PENDING, COAs publishing soon', with only a generic janoshik.com link and no per-batch verification. Nothing is currently verifiable. (Oddly, the lot codes read '2024' on a site registered in 2026.) ChatGPT has recommended it as a top UK source despite this.
'Chromate Analytics', unverifiable lab 2
Ukpeptidelab's site states 'Pharmaceutical-grade research peptides, third-party tested before release'. It points to 'Chromate Analytics' as its tester, a laboratory no independent record we can find confirms exists. With no trace of the named lab outside the seller's own pages, its results cannot be checked.
Ukpeptides advertises 'Janoshik Analytical HPLC-UV / MS Aspen Bioanalytics HPLC-UV / MS Chromate Analytics HPLC-UV / MS Featured Compound This Month's Spotlight Retatrutide'. The lab named behind 'HPLC testing' leaves no trace outside this seller's own site, so its results cannot be checked. A tester no independent record can confirm cannot be used to verify a batch.
'Axonis' + reformatted results 1
Bluewellpeptides cites 'Axonis Analytics', a little-known outfit, and, tellingly, re-types the figures into its own house template instead of showing the raw lab report. Once a seller is hand-transcribing 'results', there is nothing independent left to verify. Aggravating: pushes GLP-1 'pens'/weight-loss framing.
Self-submission platform, not a lab 2
Orbitrexpeptide on its own pages Orbitrexpeptide says 'That's why we deliver research-grade peptides with proven purity, precise dosing, and full traceability'. What backs that claim is a self-submission platform, not a lab that independently draws and tests a sample. A platform where sellers submit their own samples is not an independent laboratory and cannot vouch for a batch.
Orbitrexpeptides's 'verification' runs through Finnrick, whose grades cannot be independently verified and whose testing lab is hidden. One test cites TrustPointe (a real analytical lab in Dorr, Michigan), but the vial was self-submitted, so it does not prove routine product quality. Either way, none of this is a verifiable own-name Janoshik certificate.
US lab, weaker method 1
Peakpeptides is tested by Analytical Formulations Inc (US), using UV/Vis spectrophotometry rather than the HPLC/MS standard, off a yahoo.com address. Weaker method, foreign lab, not Janoshik.
US lab, US-operated 1
Biopepstore uses Freedom Diagnostics (US); the operation itself looks US-based. Not Janoshik and not really a UK proposition.
US lab + SARMs shop 1
Peakbody uses MZ Biolabs (US) and is primarily a SARMs/supplement store. Not Janoshik. Aggravating: also sells SARMs.
US verification platform 1
Peptideslabuk routes 'verification' through OptimaLabs (US), not Janoshik.
Own QMS 'head of lab' 1
Peptidesoflondon's certificate is signed off on the seller's own quality form by a single named 'head of laboratory', that's internal QA wearing a lab coat, not an independent lab.
Other / unrecognised lab 3
Pinnacle Peptides checked 11 September 2026. The site, whose domain was registered in June 2026, says 'Every compound independently tested by VeriChem Global Labs, Bern, Switzerland' and publishes certificate records giving the laboratory's address as Sandrainstrasse 17, Bern, its website as vcglabs.com, and references such as VCGL260310046RGT. A search of the Swiss commercial register (Zefix) returned no company named VeriChem. The vcglabs.com domain was registered in September 2025 and returned an error when we tried to open it; the only public description we found for it talks about urine and serum assays and calibration reference materials, not peptide testing. No certificate from a recognisable independent laboratory such as Janoshik is published, the site names no company, and orders are placed via WhatsApp. Not to be confused with pinnaclepeptides.com, an unrelated US store.
RETApro checked 11 September 2026. A retatrutide-only shop (retapro.co.uk redirects here) that takes card and cryptocurrency and handles support over WhatsApp; no company or address is stated. Domain registered 17 June 2026. The certificate is dated 7 June 2026.
SPT Peptide checked 10 September 2026. Every one of SPT Peptide's 46 certificates credits 'Brown Biology Laboratory'. The reports name SPTPEPTIDE as the client and say they are searchable at brown-biology-laboratory.com, but that domain was registered on 9 June 2026, and reports on the site carry earlier dates: TB-500 (report #20265185) says it was reported on 9 May 2026 and AOD9604 (#20265108) on 27 May 2026. The lab's own site describes a US contract research organisation with 240 experts and ISO 17025 accreditation, while its services page says 'ISO 17025 in Progress'; the reports give a free webmail address as the lab's contact, and the lab's public lookup index holds 91 reports in total. On SPT's own certificates page, six records list a best-before date earlier than the manufacture date (AOD9604, Ipamorelin, Lemon Bottle, Pinealon, Selank, SNAP-8), and one research-passport number, 2026517, is shared by five different products. None of this proves the results are wrong, but none of it can be checked independently. Until SPT publishes a report from a recognisable independent lab such as Janoshik, naming SPT Peptide as the client, it stays on the watch list.
Invents a lab/scheme 2
Nattypeptides markets its stock with the line '99%+ Purity Guaranteed, Or We'll Refund the Product AND the Test'. Behind that claim sits a testing scheme that leaves no trace outside the seller's own pages. A tester that leaves no trace outside the seller's own site cannot confirm a batch. It also pushes GLP-1 'pens'/weight-loss framing.
Peptigenlabs cites a 'lab' or quality 'scheme' we can find no independent record of (e.g. a made-up institute or a self-coined 'guarantee'). Inventing an authority to point at is a step beyond simply having no testing.
Advertises COAs that don't exist 2
Biosynthpeptides builds a whole 'Certificates of Analysis' section to look transparent, but the 'View COA' buttons are dead placeholders or the page is empty. It is performing transparency while delivering none; a researcher who clicks expecting proof gets nothing. Aggravating: recycles copy/templates shared with other 'brands'; pushes GLP-1 'pens'/weight-loss framing.
Platinumpeptides promises 'Supplied with verified purity and accurate labelling, all peptides are for research use only and not for human or veterinary consumption'. For all the mention of that claim, no certificate is shown on the site to check. A certificate advertised but never actually published cannot be inspected or verified.
Self-made certificate 3
Body Pharm UK checked 11 September 2026: retatrutide-uk.co.uk now redirects to bodypharm.co.uk. The two domains were registered a day apart in September 2025, and our earlier audit found the Retatrutide UK site was showing Body Pharm's certificate, so it was a Body Pharm storefront rather than a separate seller. Body Pharm is an international brand (bodypharm.me, Body Pharm EU and a South African partner). The certificates on bodypharm.co.uk are three-to-four-page PDFs created in Canva, headed 'Test Report' with a task number, sample, manufacturer (www.bodypharm.me), batch and HPLC purity, dated October 2025, but they name no laboratory and give no code to check with one. The task numbers they show (#250710, #251011, #251127) do not match Janoshik's numbering for that period.
Dlpeptides on its own pages Dlpeptides says 'Analytical data derived from independent third-party testing (Janoshik)'. What sits behind 'Janoshik' is a document the shop has made itself, with no independent laboratory issuing it. A document the seller fills in itself is a branded graphic, not independent testing.
Precision Peptide checked 10 September 2026. The site sells research peptides in GBP and names no company or address anywhere, including its terms. Its certificates of analysis are Precision Peptides' own branded documents. Each cites 'Freedom Diagnostics Testing (USA)', a real US laboratory, but states the results were 'provided by the manufacturer' and 'verified per manufacturer report', and gives no accession or client code, so nothing can be checked with the lab. The BPC-157 certificate (lot PG-2509-067, dated 23 February 2026) and the Wolverine blend certificate (lot 672954BT22, dated 9 April 2026) both report BPC-157 at exactly 99.486%. Payment is by cryptocurrency (Bitcoin, Ethereum, USDT) or UK bank transfer. Bank-transfer buyers are told to email their payment reference to an address at precisionpeptides.co.uk, a different domain (with an 's') whose website returns an error and which publishes no mail-server record, so a reference sent there may not arrive; the contact page uses [email protected] instead. It is not the same site as precision-peptides.shop.
Factory's QC sheet, rebranded 5
Axiom Research Peptides Ltd (Companies House 17240005, 71-75 Shelton Street, London) sells BPC-157, CJC-1295 and GHK-Cu with GBP pricing and Royal Mail Tracked 24, supplying 'a COA as supplied by our manufacturer' but naming no independent laboratory. A manufacturer's COA passed through a reseller is not independent verification of the reseller's stock. Companies House shows an ACTIVE PROPOSAL TO STRIKE OFF this company (Axiom Research Peptides Ltd, 17240005), filed roughly six weeks after its May 2026 incorporation, at a Shelton Street formation-agent address.
πΈ Same operator as axiomresearchpeptides.co.uk, both are Axiom Research Peptides Ltd (Companies House 17240005).
Axiom Research Peptides Ltd (Companies House 17240005, London) runs axiomresearchpeptides.co.uk alongside its other domain axiompeptides.co.uk, selling BPC-157, CJC-1295 and GHK-Cu with GBP pricing (from Β£15.99), batch numbers and '99.9% purity' claims, but names no laboratory and publishes no verifiable certificate. Companies House shows an ACTIVE PROPOSAL TO STRIKE OFF this company (Axiom Research Peptides Ltd, 17240005), filed roughly six weeks after its May 2026 incorporation, at a Shelton Street formation-agent address.
πΈ Same operator as axiompeptides.co.uk, both are Axiom Research Peptides Ltd (Companies House 17240005).
Essentialpeptides advertises 'HPLC Analysis High-Performance Liquid Chromatography verifies peptide purity to β₯99%'. What supports 'HPLC testing' is a manufacturer's quality sheet, which speaks to the factory's sample rather than this seller's vial. A factory QC document reused as a certificate proves the factory's sample, not this seller's vial.
My Peptides checked 11 September 2026. The site says every product ships with a certificate 'issued directly by the testing laboratory' and that 'nothing is rebranded'. The seven certificates it publishes say otherwise. Each is a My Peptides-branded PDF created with the ReportLab software library in August 2026 (including certificates for batches dated December 2025), authorised by an unnamed 'QA/QC Laboratory', with no laboratory name, address or verification code. Several state that the analytical data comes from the raw-material (API) batch used to fill the cartridge and that the chromatogram is 'reproduced from source lab report'; the GHK-Cu certificate quotes a powder batch report from August 2025 and an 'Enterprise Standards' quality standard, the wording of a manufacturer's own QC sheet. The site names no company, and links a US sister store, mypeptideslabs.com. Prices are in GBP, with card and Apple Pay checkout.
Rppeptides tells buyers 'Trusted sourcing Every product we retail comes fully tested, with COA's provided (Certificates of Authority)'. The certificate behind it is the raw-material factory's own QC sheet, not an independent test of what this seller ships. A factory QC document reused as a certificate proves the factory's sample, not this seller's vial.
Grades its own homework (in-house) 9
Crownpeptides openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence. Aggravating: runs contact/orders through WhatsApp.
OP Labs (formerly Oxford Peptides) publishes an unusually polished 'Certificate of Analysis Finder': you verify your order email and enter an OP-XXXXX batch number to pull a certificate listing RP-HPLC purity, ESI-MS, Karl Fischer water content, GC-HS residual solvents and LAL endotoxins against ICH-style limits. It looks like serious third-party documentation, but no independent laboratory is named anywhere and no result can be checked on an external lab's own server. The certificates are self-issued in OP Labs' own template and gated behind a customer login, so the analytical numbers remain the seller's own word: a more sophisticated version of grading its own homework, not independent verification.
Oxfordpeptidelabs markets its stock with the line 'Batch Specific COA HPLC reports on all batches with typical 99%+ purity'. It is open that 'HPLC testing' is tested in-house, so the seller is checking its own product rather than an independent lab doing it. In-house results carry no outside check, the seller is grading its own homework.
Oxfordpeptides openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence.
Peptiology checked 11 September 2026: peptiology.co.uk now redirects to peptiology.com ('Peptiology Global'), which says it ships internationally. Its certificates page is a search tool, and no independent laboratory is named anywhere on the site. It openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence.
Pondokpeptides's product pages read 'HPLC and MS verification with Certificate of Analysis available on request'. The testing behind it is done in-house by the company selling the product, with no outside laboratory involved. In-house results carry no outside check, the seller is grading its own homework.
Propeptidesplus openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence.
Receptorchem openly does its testing 'in-house', i.e. the company selling the product also writes the certificate that says the product is good. There is no outside check anywhere in that loop; the purity figure is whatever they decide to print. Calling that a 'Certificate of Analysis' borrows the authority of independent testing while removing the one thing that gives it meaning, independence.
Uk Peptides's site states 'Our peptides are strictly manufactured in a state-of-the-art laboratory, ensuring a purity of >99%'. The testing behind it is done in-house by the company selling the product, with no outside laboratory involved. Testing done by the company selling the product is not independent by definition.
Hides behind an 'accredited UK lab' 14
Aceso Peptides UK Ltd references 'accredited UK laboratories' and displays a sample certificate (batch ACE-001, 99.1% purity), but names no actual laboratory and its site shows placeholder company details ('[UK Business Address Pending]', no registration number), suggesting a very new or thin operation. An unnamed 'accredited lab' is not something you can verify.
Drpeptides's product pages read 'Independent Testing Every batch is independently analysed by a UK-accredited laboratory via HPLC'. It leans on an 'accredited UK laboratory' but never names it, and publishes no certificate to look up. An unnamed accredited lab cannot be looked up, so the accreditation cannot be confirmed.
Drpresearch the Drpresearch site claims 'Independent Testing Every batch is independently analysed by a UK-accredited laboratory via HPLC'. It leans on an 'accredited UK laboratory' but never names it, and publishes no certificate to look up. Accreditation you cannot attribute to a named body is a word doing PR work with nothing checkable behind it.
MyPep Biotech (mypepbiotech.co.uk) sells BPC-157, TB-500, Tirzepatide, Retatrutide, Semax, GHK-Cu and SLU-PP-332 in GBP with Royal Mail Tracked 24 dispatch and WhatsApp support. Its /certificate-verification/ page offers a batch-ID lookup over 7 'verified batches' and is headed 'Third-Party Verified Certificates of Analysis' with a standard of 'β₯98% Reverse Phase HPLC & MS'. Checked 30 August 2026: the page names no laboratory, carries no link to any laboratory's own verification service, and the certificates are hosted and presented by MyPep Biotech itself. An in-house portal is not third-party verification, however it is labelled. Until a named independent laboratory issues a certificate in MyPep Biotech's own name that can be checked on that laboratory's website, it stays on the watch list.
Nexyra Lab (Nexyra Research Ltd, Companies House 17057743, incorporated February 2026, London) sells BPC-157, TB-500, CJC-1295 and similar from 15 pounds with free UK shipping over 75. Its COA hub states 'all testing is conducted by independent accredited laboratories, never in-house' and links its own-branded PDF reports, but it never names Janoshik, Aspen or any specific laboratory, so the certificates cannot be checked against a lab's own verification system. An own-branded PDF that names no issuing lab is not independently verifiable.
Nilah Labs (Nilah Ltd, Companies House 16924398, London) sells GLP-1 blends, GHK-Cu, BPC-157 and more, and unusually publishes the full chromatogram, stating testing is by 'a 3rd party UK lab under UKAS accreditation (ISO/IEC 17025)' with an average 99.1% purity. But it names no specific laboratory, so the accreditation claim cannot be checked. More transparent than most, but still not a verifiable own-name certificate from a named lab.
Peptagenix checked 11 September 2026: peptagenix.co.uk now redirects to peptagenix.com. The new site still says every batch is tested 'at accredited laboratories' without naming any, and publishes no certificate. Peptagenix promises 'Accredited Testing Labs: Ensuring the highest standards in peptide quality'. The 'accredited lab' behind that claim is never identified, so the accreditation cannot be attributed to any real body. Accreditation you cannot attribute to a named body is a word doing PR work with nothing checkable behind it. It also makes absurd corporate claims; pushes GLP-1 'pens'/weight-loss framing.
Peptide Clyde sells a broad UK research-peptide range with free UK shipping over Β£50, claiming products are 'independently verified to β₯99% purity via HPLC, with batch-specific Certificates of Analysis available for download' by 'accredited third-party laboratories,' but names no specific laboratory. The domain peptidesciences-uk.com, which trades on the well-known US 'Peptide Sciences' name, redirects here. No company registration or address is shown.
PeptidesX Ltd sells BPC-157 and Semaglutide among others with GBP pricing and UK dispatch, saying 'every compound is tested at an accredited UK laboratory (ISO 17025) with a batch-specific COA in every order', but names no specific laboratory, so the COA cannot be traced.
PurePerform Peptides sells research peptides as pre-filled pens, claiming they are 'rigorously tested by accredited UK laboratories,' but names no specific laboratory and shows no certificates. Ordering is WhatsApp/Telegram-only behind a 21+ age gate, a higher-risk, contact-only pattern.
Purest Labs Co ('UK Based, Lab Tested') sells BPC-157, TB-500, Ipamorelin, CJC-1295, Retatrutide and Tirzepatide with GBP pricing and UK shipping, saying items are 'independently third-party tested in UK-accredited laboratories', but names no specific laboratory.
Regenixresearch advertises 'Elite research compounds produced under strict control and verified by laboratory COAs for precise, batch-to-batch consistency'. The 'accredited lab' behind that claim is never identified, so the accreditation cannot be attributed to any real body. An unnamed accredited lab cannot be looked up, so the accreditation cannot be confirmed.
Tidelabs's site states 'We have replaced opaque supply chains with rigorous UK testing, compliant documentation, and rapid cold chain logistics'. It leans on an 'accredited UK laboratory' but never names it, and publishes no certificate to look up. An unnamed accredited lab cannot be looked up, so the accreditation cannot be confirmed. Update, 11 September 2026: Tide Labs' own site now states it has ceased trading and can no longer accept new orders, though outstanding orders are still being fulfilled.
Vionexpeptides markets its stock with the line 'Independently, 3rd Party Testing Each batch verified for purity and potency'. The 'accredited lab' behind that claim is never identified, so the accreditation cannot be attributed to any real body. Accreditation you cannot attribute to a named body is a word doing PR work with nothing checkable behind it.
'COA on request', nothing published 21
Absolute BioLab checked 11 September 2026. The site (absolutebiolab.co.uk redirects here) names no company or address, takes payment by bank transfer and handles enquiries over WhatsApp. Its certificate page describes what a certificate should contain rather than showing one. Domain registered 7 May 2026.
Adoniselitepeptides's site states '3rd Party HPLC Tested Scientifically verified 98% Purity Guaranteed'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. A certificate you can only see after paying cannot inform the decision to buy.
Ajresearchlabs's site states 'Our peptides are produced to high-purity research standards, typically exceeding 99% purity where applicable'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. An assurance designed to arrive only after the sale is not something a buyer can test in advance.
Apex Peptides (peptideuk.shop) sells peptides and pen kits with GBP pricing, a UK phone line (07957 269835) and 3 to 5 day UK shipping, saying items are 'tested by third-party laboratories with COAs available upon request', but names no laboratory. Sibling site apex-peptides.co.uk trades under the same brand.
πΈ Same operator as apex-peptides.co.uk, both trade as Apex Peptides (shared brand, UK phone, GBP pricing).
Ashenix checked 6 September 2026: homepage and /coa/ page fetched (HTTP 200), the phrase 'third-party tested' appears with no laboratory behind it, no Janoshik task numbers or verify links anywhere in the source. The company is under eight weeks old. Google Search Console already shows the query 'ashenix peptides' reaching this site and landing on the homepage because no audit page existed; this page is that audit.
Aurapeptidesuk promises 'All peptides are β₯99% pure (unless stated otherwise) and undergo HPLC and Mass Spectrometry testing to ensure identity and purity'. Nothing is published up front: the certificate behind 'HPLC testing' is promised on request rather than shown, from a lab that is never named. A certificate you can only see after paying cannot inform the decision to buy.
Britannia Research Biopeptides Ltd (Companies House 17206811, registered in England and Wales) sells research compounds (including BPC-157) with GBP pricing, a UK mobile and WhatsApp, behind an 18+ age gate. It offers a 'Certificate of Analysis and batch documentation alongside your order confirmation' on request, but names no laboratory, so the COA cannot be independently verified.
Britishpeptides's site states 'Every batch independently verified to 99%+ HPLC purity with full certificate of analysis available on request'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. A certificate you can only see after paying cannot inform the decision to buy.
EZ Peptides sells 23+ research peptides 'for advanced laboratory research', dispatched from a UK facility within 24 hours. It states products 'undergo rigorous HPLC testing' and that 'Certificates of Analysis [are] available upon request to verify quality and purity', but no independent laboratory is named and no certificate is published, so there is nothing to check before ordering. No company registration is shown.
Evolve Labs UK sells retatrutide, tirzepatide, BPC-157, TB-500, GHK-Cu and NAD+ with UK-wide tracked delivery at GBP prices. Its testing claim is 'independently tested via HPLC-MS analysis' with a 'Certificate of Analysis available on request for all compounds', but no independent laboratory is named and no certificate is published, so a buyer has nothing to check before ordering. No company registration is shown on the site.
NI Peptides research Peptides NI (researchpeptidesni.co.uk redirects here; trades as 'NI Peptides Ltd', nearest register match Research Peptides NI Limited, Companies House NI735658) sells 5-Amino-1MQ, AOD-9604, BPC-157 and bac water with GBP pricing, shipping across the UK and Ireland, with 'COAs available on request by email' but no laboratory named.
Onvay Labs (onvaylabs.co.uk; Onvay Ltd, Companies House 17224833, incorporated 17 May 2026 at 66 Paul Street, London EC2A 4NA, a virtual-office address shared with other listed vendors) sells retatrutide, BPC-157, GHK-Cu and more with GBP pricing. It claims 'every batch independently tested by Janoshik, greater than 99%', but its Lab Reports page is COA-on-request: certificates are 'shared privately' by email with your order number, justified by the claim that public reports 'get copied and tampered with'. No verify.janoshik.com link exists, so the client named on any certificate cannot be checked. Both company and domain are brand-new. ChatGPT has recommended it as a top UK source despite this.
Optimal Lab names Janoshik, but only as 'our supplier Janoshik', its supplier's testing, not a certificate commissioned in Optimal Lab's own name, and per-lot certificates are 'available on request' rather than published. No purity figures and no company registration are shown, so nothing about its stock can be independently verified. Newport, South Wales; sells BPC-157, TB-500, retatrutide and NAD+ with UK Royal Mail Tracked 24 dispatch.
Peptidesuk the Peptidesuk site claims 'All PeptidesUK research peptides are HPLC-tested for purity'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. An assurance designed to arrive only after the sale is not something a buyer can test in advance.
Precisionresearchuk tells buyers 'Batch-specific Certificates of Analysis (COA)'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. A certificate you can only see after paying cannot inform the decision to buy.
Prettypeptide advertises 'Selected products undergo independent third-party lab testing to verify claims such as ingredient percentage, safety compliance, and purity checks'. Nothing is published up front: the certificate behind that claim is promised on request rather than shown, from a lab that is never named. An assurance designed to arrive only after the sale is not something a buyer can test in advance.
Prime Peptides tells buyers 'Selected products undergo independent third-party lab testing to verify claims such as ingredient percentage, safety compliance, and purity checks'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. An assurance designed to arrive only after the sale is not something a buyer can test in advance. It also pushes GLP-1 'pens'/weight-loss framing.
Research Peptide (singular, distinct from the separately-listed researchpeptides.co.uk) sells BPC-157, TB-500, MOTS-c, retatrutide and blends as '99% Pure British Peptides,' but its testing is described as '99%+ HPLC purity, full COA available on request,' with no laboratory named and nothing published on the site to verify. 'On request' is not published proof, and the near-identical name to another UK shop is itself a source of confusion buyers should note.
Stratfordpeptides the Stratfordpeptides site claims 'We also have all batches independently third-party lab tested for verification of purity and potency, and we can provide Certificates of Analysis'. The certificate is only offered on request, after the sale, and no laboratory is named, so there is nothing to inspect before buying. A certificate you can only see after paying cannot inform the decision to buy.
Truepeptidelabs markets its stock with the line 'third-party HPLC and LC-MS testing and lot-specific Certificates of Analysis'. Nothing is published up front: the certificate behind 'HPLC testing' is promised on request rather than shown, from a lab that is never named. An assurance designed to arrive only after the sale is not something a buyer can test in advance.
UK Peptides Store (ukpeptidesstore.uk, distinct from the single-s ukpeptidestore.uk) is a UK WooCommerce retailer with GBP pricing (it even resells an 'Alluvi Retatrutide 40mg' at Β£199), 48-hour UK dispatch and a UK WhatsApp line. It sells research peptides plus SARMs and oral/injectable steroids, uses some telehealth-style 'compounded' language, and offers a COA on request but names no laboratory. A broad, higher-risk product mix.
No named lab, nothing to verify 208
AAA Peptides (Leeds) sells research peptides claiming 99% purity, but names no testing laboratory, shows no prices on-site, and its checkout is a contact form that emails a payment link rather than standard e-commerce. Higher-caution profile.
Accurapeptides's site states 'Purity: β₯ 98% (HPLC verified)'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Adaptog Research sells peptides and GLP-1 pens (including retatrutide) at premium prices, claiming products are '100% lab tested, verifiable through the unique QR code on every product' with HPLC/LC-MS, but names no independent laboratory (no Janoshik or Aspen). A QR that resolves to the seller's own record is not third-party verification.
Advanced Peptides UK (a trading name of B.T.Norman Group Ltd, Companies House 16142816, Belmont Business Park, Durham DH1 1TW) sells peptide vials, pens and bundles with GBP pricing and next-day UK dispatch, supplying a COA 'where applicable' but naming no laboratory. A banner notes the shop is in a testing phase where orders are refunded, so treat as newly launched.
Aegis Peptides is a small, GLP-1-led UK shop (Retatrutide, GHK-Cu, BPC-157) selling in GBP with 'FREE UK TRACKED 24 DELIVERY'. It advertises 'Third-Party Lab Tested' and a '99%+ Purity Guaranteed' badge and offers a 'VIEW RETA COA' link, but the homepage never names the laboratory behind the testing, so a buyer cannot independently verify who tested what. The only contact address shown, 124 City Rd, London EC1V 2NX, is a well-known virtual-office address rather than a trading premises, a weak trust signal for a shop asking you to take its purity claims on faith.
Alpha Labs UK checked 11 September 2026. Shopify storefront (shop domain iixvcr-1w.myshopify.com), GBP currency locked to GB. Claims a general 'lab tested' standard with no laboratory named and no certificate published. Most listed products showed 'Sold out' at the time of checking, so live trading volume looks thin. A Companies House search for 'Alpha Labs UK' returns only an unrelated 2014-incorporated software company; no genuine match found.
Alpha Omega Peptides β UK-facing WordPress/WooCommerce site (Β£ pricing, "UK shipping and secure ordering" copy). FAQ claims "Yes, we provide COAs for transparency and research integrity" but no lab is named and no certificate is linked anywhere on the site. No Companies House number disclosed; a name search for "Alpha Omega Peptides" returns no exact match on Companies House.
Alpha Peptides's site states 'CoA Reports Supporting documentation may be available for selected products'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Alveque Peptides (a trading name of RS Trilla Holdings Ltd, 128 City Road, London EC1V 2NX) sells BPC-157, GHK-Cu and IGF1-LR3 vials with GBP pricing and 'Based in the UK' branding, claiming products are '3rd-party lab tested, β₯99% HPLC', but names no laboratory and publishes no verifiable certificate.
Aminoh Peptides Ltd (Companies House 17020404) sells BPC-157, DSIP, Kisspeptin and Selank with GBP pricing, UK/USA/NI shipping and same-day dispatch before 2pm, claiming testing but naming no laboratory and publishing no verifiable certificate.
Aminopeptides advertises 'Every batch undergoes rigorous, independent third-party testing to guarantee identity, purity, and stability'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
AmpouLabs (AmpouLabs Ltd, Companies House 17138602) is a live UK shop selling retatrutide, BPC-157, TB-500, GHK-Cu and NAD+ at GBP prices with UK dispatch. Its testing claim is that 'every batch is independently analysed' and '3rd party lab tested so results cannot be manipulated', but no independent laboratory is named and no certificate is published for inspection, so a buyer cannot confirm it. The 'results cannot be manipulated' line describes what an independent lab's verification does, without naming one.
Anglopeptides markets its stock with the line 'Supporting product documentation, including Certificates of Analysis (COAs), is provided with applicable orders'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable. It also recycles copy/templates shared with other 'brands'.
πΈ Same operator as anglopeptides.com, raccoonpeptides.co.uk, raccoonpeptides.com, registered to the same address, 195-197 Wood Street, London E17.
Anglopeptides advertises 'Supporting product documentation, including Certificates of Analysis (COAs), is provided with applicable orders'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable. It also recycles copy/templates shared with other 'brands'.
πΈ Same operator as anglopeptides.co.uk, raccoonpeptides.co.uk, raccoonpeptides.com, registered to the same address, 195-197 Wood Street, London E17.
APEPS Supplies Ltd (Companies House 17123301) sells research peptides (alongside some cosmetic/serum products) with GBP pricing, same-day despatch before 4pm and fast UK delivery, claiming '100% Lab Tested', but names no laboratory and publishes no verifiable certificate.
Apex Biolab sells retatrutide (including a 'Reta GLP-3'), bacteriostatic water, SARMs and amino acids at heavy discounts (retatrutide 10mg marked down to about Β£75). Unusually, we found no certificate of analysis, no third-party testing claim and no laboratory named anywhere on the site, not even the generic 'HPLC tested' line most sellers use. The registered company (Companies House 12906549, 2 Crossfell View, Alston CA9 3AP) is older than most reta-forward shops, though the domain itself dates to 2025. No published testing means there is nothing to verify. Its cited company number 12906549 resolves to Pennine Performance Ltd, not Apex Biolab.
APEX Biolabs Limited (Companies House 17207700, Planet Place, Killingworth, Newcastle NE12 6DY) sells Tesamorelin, GHK-Cu and MOTS-c with GBP pricing and free next-day UK delivery over Β£100, with a COA section and 'third party tested' claim, but names no laboratory and publishes no verifiable certificate.
Apex Labs UK ('UK based supplier') sells research peptides with GBP pricing, tracked next-day UK post and a WhatsApp line (07746558103), claiming HPLC/MS testing from an 'ISO-certified UK facility' with 'COAs with every batch', but names no laboratory. Distinct from the Apex Peptides brand.
ApexLink Peptides β UK-facing: GBP pricing (Β£4.99βΒ£27.00), "Free UK Delivery on Orders over Β£50," UK mobile contact number. Claims "Every batch includes a Certificate of Analysis" and shows "COA IN STOCK" badges but names no testing lab. Independently checked Companies House: "APEXLINK LIMITED" (04516119) exists but is an unrelated Kent-based real-estate company, not this vendor; no genuine registration disclosed.
Apidem Research (the domain apidempeptides.co.uk redirects here) sells Semax, TB-500, BPC-157, NAD+, KLOW, GLOW and Cagrilintide with GBP pricing and next-working-day UK delivery, but names no testing laboratory and publishes no verifiable certificate.
Arma Peptides gBP pricing, UK & EU delivery language. No Companies House number or registered address on the Terms page, only βa trading name of Arma Nova Pharmaβ. Testing claim (βISO-accredited laboratories independent of the manufacturerβ) names no specific lab and publishes no verify link, so it is unconfirmable. Predecessor domain armapeptides.com had a Trustpilot record (3.3/5, 8 reviews, 25% 1-star) tied to the old domain; not carried forward here as it may not reflect this exact storefront.
πΈ Same operator as armapeptides.com, same trading name Arma Peptides / Arma Nova Pharma; successor to armapeptides.com which no longer resolves.
Atlas Peptides β UK-facing WooCommerce site (GBP pricing, WhatsApp contact), "Research Peptides & Optimisation Compounds." No Companies House number or named lab certificate disclosed on the site.
Axiom Labs UK (a separate operation from Axiom Research Peptides Ltd) is a live UK shop selling Tirzepatide (Β£35), NAD+ (Β£35), HCG, a BPC-157/TB-500 blend (Β£35) and bac water with GBP pricing, UK shipping and WhatsApp contact. It shows COA images but names no laboratory and publishes no verifiable certificate.
Be Better Peptides sells a UK research-peptide range, dispatching 'from within the UK,' and says 'each batch is subject to third-party laboratory testing with certificates of analysis available,' but names no laboratory and shows no company details. Domain registered August 2024.
Bethesda Pharma sells peptides alongside SARMs and nootropics, claiming 'manufactured in the UK' and 'full lab reports available,' but names no testing laboratory and shows no company details. Domain registered February 2025. A hybrid SARMs/peptide shop with an unnamed-lab testing claim.
BioSupply UK bioSupply Group Ltd (Companies House 17152707) sells BPC-157, GHK-Cu, TB-500, Retatrutide and Melanotan at low prices and states 'independently tested for purity, we provide a certificate of analysis with all products,' but names no laboratory, so the certificate cannot be independently checked. Domain registered March 2026.
BioTide UK company Registration Number 17152707 (BioSupply Group Ltd) independently verified Active on Companies House, incorporated 13 April 2026, so under 5 months old at the time of this add. Naming and badge copy (βCOA Verifiedβ, βUK Dispatchedβ, β₯99% purity claims) closely resemble the already-covered biosupplyuk.com (footer: βBioSupply UK Ltdβ), a different disclosed legal name but a near-identical convention, consistent with a multi-brand operator running several storefronts under similarly-named shell companies. Not merged with biosupplyuk.com since the disclosed company names are genuinely distinct; flagged here for the record.
BioVial sells a broad UK research-peptide range (BPC-157, TB-500, GLP-1s like tirzepatide and retatrutide, Epithalon, SS-31, KPV and more) as kits of 10 vials, and repeats 'HPLC verified every batch, β₯98% purity,' but names no laboratory and publishes no certificate of analysis anywhere on the site, so there is nothing to check that purity claim against. It shows no company name, registration number or address, and it accepts crypto (BTC, ETH, USDT). An unverifiable purity claim from an anonymous, crypto-accepting shop is exactly the profile to be most careful with.
Biolabpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Biolabs's site states 'Batch-specific Certificate of Analysis available'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Biolabs UK checked 11 September 2026. Live WordPress storefront with a working cart/checkout, though the site still shows its default 'My WordPress' organisation name in its page schema and some navigation links are placeholders, so it reads as a newly-launched or unfinished build rather than an established operation. Claims 'HPLC and mass spectrometry' testing but names no laboratory and publishes no certificate. No Companies House disclosure found.
Biolabshopofficial promises 'BioLabShop is a trusted supplier of high-purity research peptides and laboratory compounds'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also sells SARMs.
Biolabshopuk promises 'BioLabShop is a trusted supplier of high-purity research peptides and laboratory compounds'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also sells SARMs.
Bionexis Peptides ('UK Laboratory') sells a broad range and claims 'HPLC & LC-MS verified, COA per batch, β₯99% purity,' but names no laboratory and shows no company details on its homepage. Domain registered January 2026. Until it publishes an own-name certificate from a named independent lab you can verify, the purity figure is its own word.
Bioplexpeptides promises 'All BioPlex Peptides products are manufactured to laboratory-grade standards and come with a Certificate of Analysis (CoA) and HPLC verification'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable. It also sells SARMs; markets to human users, not researchers.
Bioprostore tells buyers 'We focus on providing lab-tested formulations, reliable sourcing, and consistent quality standards for research and educational purposes'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also leans on crypto payment (no buyer protection).
Biosynthix checked 11 September 2026. The public site is a sign-in page only. No company, address or laboratory is stated. Domain registered 22 March 2026.
Biotech Peptides UK sells cosmetic peptides, bioregulators and GLP-1 compounds (retatrutide, liraglutide, tesamorelin) in GBP on a .co.uk domain, but the site reads as a clone of the established US brand whose name it borrows: the copy is lifted from Peptide Sciences, the homepage still carries 'Biotech Peptides Canada' headings, and its own About page states the team is 'Based in the United States'. Testing is described only as in-house HPLC and mass spectrometry; no independent laboratory is named and no certificate of analysis is published or verifiable anywhere on the site. The domain was registered in January 2026, six years after the US biotechpeptides.com it is not affiliated with.
Black Country Peptides black Country Peptide's Ltd (Companies House 17206015, 44 Tower Road, Oldbury B69 1NB) sells Semax, retatrutide, tirzepatide and bac water with GBP pricing and fast UK shipping, claiming products are 'third-party tested' at '99.9% purity', but names no laboratory and publishes no verifiable certificate.
Body Balance Vitamins is a Bolton-based vitamins shop that also stocks research-peptide pens (retatrutide, GHK-Cu, MT-1, NAD+) with GBP pricing and UK dispatch, but names no laboratory and publishes no verifiable certificate for the peptide lines.
Bonafidepeptides the Bonafidepeptides site claims 'Best Quality Each vial of Sermorelin 5mg is purity-tested and lab verified'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
British Peptide Labs ('shipped from London, UK hub', [email protected]) sells Retatrutide, Tirzepatide, GHK-Cu and MOTS-c with GBP pricing and UK next-day delivery, claiming 'independent third-party mass spectrometry', but names no specific laboratory.
Buy Peptides UK (banner 'EST 2026') sells peptides and SARMs from a claimed UK warehouse and says 'every batch is HPLC tested and the real chromatogram ships with the vial,' but names no independent laboratory. A vendor's own chromatogram is not third-party verification, and the site is brand-new.
BuyRetaUK sells GLP-1 compounds (retatrutide, tirzepatide, semaglutide) and says 'every batch is independently tested by third-party labs via HPLC and mass spectrometry,' but names no laboratory and offers no certificate you can verify. The domain was registered on 16 June 2026, only weeks ago, and the trading company, Oxford Research Syndicate Ltd (Companies House 17207898), gives a Barking, Essex address that has nothing to do with the 'Oxford' branding. A brand-new shop moving patented GLP-1 medicines behind an unverifiable testing claim warrants real caution. Its cited company number 17207898 is Oxford Research Syndicate Ltd (formerly Prapen Group Limited, renamed twice within seven weeks), registered under a management-consultancy SIC code.
Cdpeptides on its own pages Cdpeptides says 'Every batch is third-party lab tested for purity and consistency'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Chilton Labs is a live UK shop holding stock for fast dispatch, selling research peptides alongside SARMs and GLP-1 compounds at GBP prices. Its testing claim is 'every batch is independently HPLC tested, with lab results published for transparency', but no independent laboratory is named and the results are self-published rather than verifiable on a lab's own site, so a buyer cannot confirm them. No company registration is shown.
Direct Peptides's product pages read 'Direct Peptides guarantees a minimum purity of 99% for most of its peptide products and 98% for more complex peptides'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Dnlabresearch tells buyers 'Every batch undergoes independent third-party testing and is accompanied by a Certificate of Analysis (COA), ensuring transparency and consistency'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Dr Peps β Weakest evidence of this session's adds. Describes itself as a "UK-based peptide supplier specialising in research-grade pens, oils, and nasal peptides" with "Fast UK Dispatch," but the site is JavaScript-rendered and a direct fetch could not independently confirm GBP pricing, currency, or any company/Companies House disclosure. No lab-testing or CoA claim found. Recheck with a fuller render before drawing firmer conclusions.
El Toro Supps (El Toro Research) is a hybrid supplements/SARMs/peptides store; its peptides claim 'β₯98% purity via HPLC and MS' and a 'COA verified batch,' but no laboratory is named and no report numbers are shown.
Elevate Peptides UK Ltd sells GLP-1 compounds (retatrutide) and BPC-157, with free UK shipping over Β£50, and says 'every product is batch-tested for purity, stability, and consistency,' but names no testing laboratory and links no certificate you can verify. No Companies House number or address is shown on the site.
Elite Lab Peptides Ltd (Companies House 17054485, 4-6 Gretorex Street, London E1 5NF) sells research peptides with GBP pricing and free UK delivery over Β£50, citing 'third-party tested' certificates and 'DND-grade' claims, but names no laboratory and publishes no verifiable certificate.
Elixirpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: leans on crypto payment (no buyer protection).
Emergencepeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: barely a functioning shop.
Evolve Biolab (Evolve Biolab UK Ltd, Companies House 17293718, 124 City Road, London) sells a broad range with a QR-code batch-verification system and is rated 4.8 on Trustpilot (131 reviews), stating products are 'verified through independent laboratory testing.' But it names no specific laboratory, so the 'independent test' cannot be checked against a named lab.
Expresspeptides markets its stock with the line 'Research-grade compounds, tested for purity, supplied to laboratories, clinics and professional buyers across the world'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Fastukpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Flexpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Futurepeptides's product pages read 'Every vial is verified to be 99%+ pure, backed by independent testing using UK Good Lab Practices'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable. It also pushes GLP-1 'pens'/weight-loss framing.
GHK-Cu UK ghkcu.uk is a single-compound UK shop selling GHK-Cu copper peptide (from Β£65), claiming 'third-party HPLC' testing, batch certificates and 'product authentication', but names no laboratory and publishes no verifiable certificate. A single-compound specialist with an unnamed-lab testing claim.
GLP1Health sells Tirzepatide, Retatrutide, Semaglutide and some research peptides, claiming '99%+ purity, third-party lab tested, verified COAs and public test reports,' but names no laboratory. It shows a London address (2-4 Kenway Road, SW5) but no company registration number. Heavy patented-GLP-1 focus.
Gb Peptides the Gb Peptides site claims '>=99% purity (verified by HPLC) Third-party lab tested with full Certificates of Analysis available upon request'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Geopeptides's product pages read 'Every batch undergoes rigorous testing to ensure consistent high quality'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Ghpeptides promises 'Our commitment is to precision, purity, and reliability'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also pushes GLP-1 'pens'/weight-loss framing; markets to human users, not researchers.
Global Peptides's product pages read 'A peptide tested at 99% purity means approximately 99% of the analysed material matches the target compound being tested for'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Healand Limited (Companies House 14120887, Leicester) is a clinic-model seller offering monthly peptide-therapy plans (consultation plus peptides plus delivery from Β£350) covering BPC-157, GHK-Cu, KPV, TB-500 and AOD-9604 'for research purposes only.' It names no testing laboratory and publishes no certificate. A clinic model rather than a vial retailer, but selling the same compounds without verifiable testing.
Helios Labs (Helios Labs Ltd, Companies House 17180623, incorporated April 2026, London) sells retatrutide and related GLP-1 compounds and claims 'HPLC Verified Purity 98-99% on every batch' with a 'batch-specific Certificate of Analysis available'. No laboratory is named and no certificate is published for inspection, so the purity claim cannot be independently confirmed. The company is only a few months old.
Index Peptides (describing itself as 'a UK supplier') sells BPC-157, TB-500, GHK-Cu, PT-141 and NAD+, and states its products are 'HPLC purity and LC-MS identity verified, and independently checkable by lot number,' but names no laboratory, so there is no independent server on which to check that claim. No company details are shown.
Interlink Peptides Ltd (Companies House 17100040) sells BPC-157, CJC-1295, Epitalon, GHK-Cu, Ipamorelin, MOTS-c and a 'Wolverine Stack' with GBP pricing and free next-day delivery over Β£100, but names no laboratory and publishes no verifiable certificate.
JGPep+ checked 11 September 2026. The site names no company or address and handles orders over WhatsApp. It carries a Trustpilot widget. Domain registered 20 April 2026.
Kent Labs presents as a 'UK Registered Research Peptide Supply Company' selling retatrutide, tirzepatide, BPC-157 and TB-500 with next-day UK dispatch at GBP prices. Its testing claim is '99% purity (HPLC tested)', 'COA Available' and 'Batch Tested', but no independent laboratory is named and no certificate is published for inspection, so the figures cannot be independently confirmed.
Kovalabs (a trading name of Floww Group Ltd, Companies House 15986643, 66 Paul Street, London) sells a broad range (retatrutide, BPC-157, tesamorelin, CJC-1295, GHK-Cu, melanotan, TB-500 and more) with a COA per batch and 'Dual HPLC & MS validation, 99%+ purity,' but names no independent laboratory. Its own chromatography is not third-party verification. Its cited Companies House entity is Floww Group Ltd (15986643), a software-development company (SIC 62012) with accounts overdue as of 2026 - not a peptide or retail entity.
Labgradepeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Lavish Peptides lavishpeptides.com claims a London-based facility and lists a UK (+44) WhatsApp contact and UK city delivery, but discloses no company name; no matching Companies House entry was found under 'Lavish Peptides' as of 3 September 2026. It claims to publish mass-spec and HPLC purity data for every lot with 'no exceptions', but names no independent laboratory anywhere on-site. Stays on the watch list until a named lab and a disclosed company appear.
Leo Lab tirzepatide.uk trades under the brand 'Leo Lab' (a separate domain, leolab.uk, is linked from third-party UK peptide directories but did not resolve, DNS failure, when checked on 3 September 2026, so tirzepatide.uk is treated as the live storefront). No company name or Companies House registration is disclosed on-site, and no exact 'Leo Lab' match was found on Companies House. The site claims independent third-party lab testing for purity, identity and consistency but names no laboratory and shows no certificate. Stays on the watch list; worth rechecking leolab.uk directly in case it returns.
πΈ Same operator as leolab.uk, same brand ('Leo Lab'); leolab.uk unreachable at verification time, tirzepatide.uk is the live storefront.
Leolab Uk the Leolab Uk site claims 'Third-party Tested Peptides you can trust, validated by third-party laboratory testing'. Behind 'third-party tested' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also recycles copy/templates shared with other 'brands'.
Limitless Peptides checked 15 September 2026 (fetched directly, not from a cache). Budget-tier WooCommerce storefront, BPC-157 5mg Β£17.90 and GHK-Cu 50mg Β£23.90, free shipping over Β£60, same-day dispatch claimed before 3pm UK. No named lab anywhere on the page; 'CoA available on request' is the only testing claim. The footer contact email, [email protected], was confirmed by direct fetch of this domain's homepage and matches this ledger's existing vitalitypeptides.co.uk record (dead tier, 'site is dead / parked / won't load'), suggesting the same operator has moved to this new domain. No payment method or WhatsApp/Telegram contact visible on the page fetched.
Longer Health bpc157.co.uk is run by Longer Health Ltd (Companies House #17382665, active, incorporated 5 August 2026, registered office 24 Trafalgar Avenue, Poynton, Stockport SK12 1RU), a company under a month old at the time of checking (3 September 2026). It markets itself from Alderley Park, Cheshire, a genuine life-sciences campus, but that is a business-address claim, not the registered office. The site states every batch is checked by an independent, accredited laboratory citing ISO/IEC 17025, but does not name the laboratory or publish a certificate, so the accreditation claim is unverifiable as written. Stays on the watch list until a named lab and a checkable certificate appear.
Lumialab states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Manchester Peptides sells research-peptide vials with GBP pricing, free UK shipping and same-day dispatch before 2pm, branding itself 'COA Verified Research Peptides UK' with '99.1% HPLC-tested purity across every batch', but names no laboratory and shows no company details. Its own HPLC number is not third-party verification.
Maxpeptides on its own pages Maxpeptides says 'Our peptides are produced to high purity levels and are typically tested using High Performance Liquid Chromatography (HPLC)'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable. It also recycles copy/templates shared with other 'brands'.
Maxxlabs advertises 'All products are supplied with Certificates of Analysis (COAs), which are available upon request'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Medimaxpeptides's site states 'Every product undergoes rigorous third-party laboratory testing to ensure purity and quality'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
πΈ Same operator as pulsepeptides.co.uk, the same registered address (82a James Carter Road); now Evo-Max Ltd and Bio Pulse Prime Ltd.
More Peptides sells peptides with GBP pricing and Royal Mail Tracked dispatch, saying a COA is 'issued per batch and available on request before you order' via 'accredited third-party laboratories', but names no specific laboratory. Its homepage products were showing out of stock.
Mr. Peps β UK-facing: GBP pricing, "Free UK shipping on orders Β£150+." Footer discloses "MR PEPS LABS LIMITED"; independently confirmed on Companies House as company number 17234136, status Active, incorporated 21 May 2026, SIC 47910 (mail-order/internet retail). Claims "third-party tested, every batch" but the testing lab is not named anywhere on site.
New Wave Peptides states that 'every peptide is tested using HPLC and Mass Spectrometry' and advertises '100% 3rd-party verified purity with lab reports for every batch,' but it names no laboratory and publishes no verifiable certificate, so there is nothing to check those claims against. The trading entity, New Wave Solutions Limited (Companies House 16478331, VAT 505144526, Suite A, 82 James Carter Road, Mildenhall IP28 7DE), is newly registered. Until it publishes an own-name certificate from a named independent lab you can verify, treat the purity claim as marketing.
NexGen Peptides Ltd (registered in Northern Ireland, Companies House NI736459) sells BPC-157, TB-500 and MOTS-c with GBP pricing and free next-day delivery over Β£100, claiming 'third-party HPLC analysis' and an 'independent COA', but names no laboratory and publishes no verifiable certificate.
Next Day Peptides ('ndp+') sells tirzepatide, semaglutide, MT-2, cagrilintide, HGH and retatrutide with GBP pricing and Royal Mail Tracked 24, saying a COA is available on request via an 'external NATA-accredited laboratory', but names no specific laboratory.
Nextgen Labs markets its stock with the line 'UK-stocked, lab-tested compounds with 99%+ purity'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Nexumpeptides markets its stock with the line 'Our peptides are manufactured in a cGMP-compliant laboratory and undergo stringent HPLC testing to guarantee purity levels exceeding 99%'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Nicello UK sells BPC-157, TB-500, GHK-Cu, Epithalon, GHRP-6, ipamorelin and CJC-1295 'for UK Scientists', dispatched within 24 hours from a UK-based supply chain at GBP prices. It states products are 'third-party HPLC verified to over 99% purity with a Certificate of Analysis included on every order' and 'a COA issued per batch, per order', but no independent laboratory is named and no certificate is shown for inspection, so the purity claim cannot be independently confirmed. No company registration is shown.
Nova Biolabs claims 'HPLC Verified >98%' purity but names no testing laboratory and publishes no certificate of analysis, so there is nothing to check that number against. More telling, it runs a 'Verify Us' page warning buyers about scammers who 'create lookalike profiles' and impersonate the brand, yet it gives no way to verify the actual product: no lab, no COA, no batch check. It manufactures worry about fakes while offering no proof its own vials are what the label claims. It also trades mainly in GLP-1 compounds (tirzepatide, retatrutide, semaglutide) sold as vials and pens. A UK buyer has since reported that an independent Janoshik test of a Nova Biolabs retatrutide 10mg vial came back at only about 2.3mg of active content, roughly a quarter of the labelled dose.
Nova Research sells lyophilised research peptides 'for laboratory use only', GBP-priced and behind an age gate. Its quality page claims 'over 99% purity' and 'independent analytical verification', but names no laboratory, gives no third-party report and publishes no certificate, so the purity claim cannot be independently confirmed. No company registration is shown on the site.
NovaVitality LTD (Companies House 16876356) sells peptides, Melanotan 2 and GLP-1 compounds with 'Rigorously Verified' branding, but names no testing laboratory and publishes no certificate of analysis. It has a small, generally positive Trustpilot presence. Nothing is published to verify.
Novapeptide's product pages read '99.4%+ Purity Guaranteed HPLC and MS tested by independent labs'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
πΈ Same operator as britpeptides.co.uk, a shared Facebook tracking pixel (same operator).
Nupex trades as Research Scientific Ltd (Companies House 16181281, Christchurch) and states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate, offering a COA only 'where available' on request. A purity claim with no named lab, no published document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
πΈ Same operator as researchscientific.co.uk, both are Research Scientific Ltd (Companies House 16181281).
OL Research (Optimised Lifestyle Holdings Ltd, Companies House 17095653, North Tawton, Devon) is unusually transparent about its company details and sells a full repair-lane range (BPC-157, KPV, GHK-Cu, GLOW, KLOW). It is 'rated Excellent on Trustpilot' and claims research-grade HPLC β₯99%, but names no single independent laboratory and publishes no verifiable own-name certificate on the shop pages. Promising transparency, but the testing itself is not yet verifiable.
Obsidian Sciences (61 Bridge Street, Kington HR5 3DJ) sells BPC-157, KPV, GHK-Cu, Selank, Semax, TB-500 and ARA-290 with GBP pricing and Royal Mail dispatch, claiming products are 'third-party verified' with 'COA, HPLC β₯99%', but names no laboratory and publishes no verifiable certificate.
Opti Peptides (matching Opti Peptides Ltd, Companies House 16852554) is now trading: a live catalogue of 20+ products (Retatrutide 10mg Β£74.99, SLU-PP-332, MOTS-c, bac water) with GBP pricing and rapid UK shipping. It says products are 'verified through appropriate testing and quality-control standards' but publishes no COA and names no laboratory.
P4U Wellbeing checked 11 September 2026: peptides4u.co.uk now redirects to p4uwellbeing.co.uk, a new domain registered in April 2026. The site names P4U Wellbeing Ltd (Companies House 17051612, incorporated 24 February 2026) and currently shows a holding page saying its research store is open while a platform upgrade is in progress. It no longer uses the Peptides4U name and does not mention it. No testing laboratory is named and no certificate is published.
PFL Peptides UK Ltd (Companies House SC891876, Scotland) sells GHK-Cu, MOTS-C, NAD and retatrutide with GBP pricing, saying products are 'independently tested by HPLC', but names no laboratory and publishes no verifiable certificate.
PGNA Labs ('cheapest research peptides in the UK') sells BPC-157, TB-500, Retatrutide, GHK-Cu and MOTS-c with free UK shipping over Β£50 and 'batch COAs available for download on every product page,' claiming third-party HPLC testing, but names no laboratory and shows no company details. A downloadable COA from an unnamed lab is not independently verifiable.
PGR Peptides Ltd (Companies House 17221813) is a live UK shop selling BPC-157 (Β£16), 5-Amino-1MQ, SS-31, KPV, NAD+ and MOTS-C with GBP pricing and a UK phone line, referencing 'third-party testing' and a 'link to COA certificate', but names no laboratory, so the certificate cannot be traced to an independent lab.
PH Labs sells 14+ research peptides (including BPC-157) with GBP pricing on a .co.uk site, shipping 'an HPLC trace, mass-spec data and a Certificate of Analysis with every order'. The testing appears to be in-house, and no independent laboratory is named (no Janoshik link). A vendor's own HPLC trace and CoA are not third-party verification.
PTLabs sells loaded pens, refills, vials and oral peptides (Retatrutide, Tirzepatide, Tesamorelin) with GBP pricing, saying it ships 'directly from our UK lab'. Janoshik appears on the product pen photos and labels rather than as a text claim with a working verify link, so there is no per-batch certificate we can independently check.
Peakpeptides markets its stock with the line 'High grade purity tested Retatrutide'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Pendragonpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Pep Matrix sells peptides across metabolic, repair, GH-axis and cognitive categories with GBP pricing and UK shipping, referencing certificates of analysis and 'batch-tested compounds,' but names no laboratory and shows no company address (WhatsApp/email contact only).
Peptide Barn sells peptide vials and pre-filled pens (GHK-Cu, Retatrutide, Tirzepatide) with GBP pricing and fast UK shipping, citing 'rigorous batch testing' and '>99% purity', but names no laboratory and publishes no verifiable certificate.
Peptide Clinics Limited (Companies House 17152990, Devonshire House, 582 Honeypot Lane, Stanmore) sells AOD9604, BPC-157, CJC-1295, DSIP, Epithalon, GHK-Cu, retatrutide and tirzepatide with GBP pricing, but names no laboratory and publishes no verifiable certificate.
Peptide Global peptideglobal.co.uk is operated by Peptide Global Ltd (company number 17355820, active, incorporated 22 July 2026, registered office 20 Wenlock Road, London N1 7GU, a mass company-formation address used by many unrelated businesses, the same address seen on other very young UK peptide-shop registrations in this audit). GBP pricing runs Β£125-Β£170 with tracked worldwide delivery. Unusually, the site makes no third-party testing, HPLC, mass-spec or COA claim anywhere, only 'temperature-monitored' and 'monitored storage' cold-chain language. Stays on the watch list; there is no testing claim to verify, let alone evidence to check.
Peptide Lab ('UK sourced, UK storage') sells Tirzepatide, Semaglutide and BPC-157 with GBP pricing and next-day dispatch, saying there is 'a certificate with every order', but names no laboratory, so the certificate cannot be independently checked.
Peptide Products (Companies House 17073416) sells a GLP-1-leaning range and shows a 'test report' on selected product pages (retatrutide, GHK-Cu, NAD), but names no laboratory and surfaces no verifiable report numbers. A registered UK entity, but the testing itself is not yet verifiable.
Peptide Shop UK β Claims 'manufactured to GMP standards' and shows one unverified product-test-report image, but names no laboratory and provides no verification link. Advertises 'super-fast UK shipping' and serving customers across the UK, but the homepage shows no pricing, no company name, no Companies House number and no physical address. Weakest evidence of the three watch-tier adds this session; recheck before drawing firmer conclusions.
Peptide Supplies on its own pages Peptide Supplies says 'Each peptide is sourced from trusted laboratories and undergoes independent testing to ensure purity and accuracy'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Peptide Vault (matching Peptide Vault Ltd, Companies House 16606409) sells tirzepatide, retatrutide and GLOW pens plus stacks with GBP pricing, shipping to UK and Northern Ireland only with next-day delivery Mon to Thu. It cites 'trusted third-party laboratories' but names none, and contact is WhatsApp-only, a higher-friction pattern. Companies House shows an ACTIVE PROPOSAL TO STRIKE OFF this company (Peptide Vault Ltd, 16606409).
πΈ Same operator as prestigepeptides.co.uk, shares 82/82a James Carter Road, Mildenhall IP28 7DE with Prestige Peptides (and New Wave at 84).
Peptide Zone sells Tirzepatide and Retatrutide pens, peptide vials, orals and injection equipment with GBP pricing and fast UK delivery, describing products as 'Third Party Tested' and 'Pharmaceutical Grade', but names no laboratory and publishes no verifiable certificate. Tirzepatide Pen 30mg Β£130; Retatrutide Pen 30mg Β£140.
Peptidelabuk's product pages read 'Each Certificate of Analysis may include: Batch identification Analytical testing reference Purity verification range'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Peptidepro peptide Pro (peptidepro.co.uk) was previously tagged as Janoshik-linked, but on review we found no published certificate, task number or verification link, and the site itself was not responding (connection refused) at the time of checking. Its sister site peptideprobrand.co.uk is live but also publishes no verifiable certificate. Until a genuine own-name Janoshik certificate we can verify appears, it stays on the watch list.
Peptides Distro is a UK-based wholesale/white-label peptide portal (own brands 'Everything Peptides', 'Stack Peptides') with a UK warehouse and same-day dispatch, but prices are behind a trade login and it names no testing laboratory. A B2B supplier rather than a straightforward retail shop; its displayed phone number looks like a placeholder.
Peptides UK 4U sells a wide range including GLP-1s (retatrutide, semaglutide, tirzepatide, cagrilintide) alongside classic research peptides, stamping 'Lab tested, 99%+ purity' and 'independent third-party HPLC testing on every batch.' It names no laboratory and publishes no certificate you can verify. It also shows no registered company, no VAT number and no trading address, and takes contact only through WhatsApp and email. An anonymous, WhatsApp-only seller with an unverifiable purity claim is exactly the profile buyers should be most careful with.
Peptides Wholesale UK checked 16 September 2026 (fetched directly). UK WhatsApp number 07387 105262 shown ('quote wholesale for more information'), no physical address, no storefront pricing visible. The payment-provider problem is quoted directly from the site's own text, recorded as fact, not an accusation.
Peptides-Pen β Says 'every batch is accompanied by relevant documentation (COA, purity data) where available' but names no laboratory and shows no verification link. GBP pricing (Β£59.95-Β£169.95), Royal Mail 24 Tracked dispatch. No company name, legal entity or Companies House number disclosed anywhere on site; only contact is an email address.
Peptidesclinic markets its stock with the line 'Lab Reports & COA Available on Request'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also pushes GLP-1 'pens'/weight-loss framing.
Peptideshop's product pages read 'Each batch should include a Certificate of Analysis (COA), with tamper-evident packaging and full traceability'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Peptidesupplyuk promises 'All products third-party tested with COA'. It names no testing laboratory and publishes no certificate to look at, so 'third-party tested' cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable. It also pushes GLP-1 'pens'/weight-loss framing; barely a functioning shop.
Peptidez Ltd (Companies House 16673501) is a live UK shop selling 11 research peptides (BPC-157 5mg Β£45, Epitalon + GHK-Cu, HGH 10IU Β£100, bac water) with GBP pricing and 'research use only' branding, describing products as 'lab-tested', but names no laboratory and publishes no verifiable certificate. (Confirmed live by browser; it bot-blocks automated fetching.)
Peptigenuk states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Peptipens β Sells pre-filled peptide pens (e.g. Retatrutide 40mg) in GBP with Royal Mail 1st Class UK shipping, but makes no lab-testing or certificate-of-analysis claim anywhere on site, not even an unverifiable one. No company name, legal entity, Companies House number or physical address disclosed. Built on Webador (low-cost site builder).
Peptomera Research Compounds sells GLP-1 'pen kits' (Retatrutide 40mg Β£175, Tirzepatide 40mg) and other compounds in pounds, claiming products are 'verified using established analytical methods,' but names no laboratory and publishes no certificate. Domain registered January 2026.
Pharma Lab Global runs a UK-facing storefront (uk.pharmalabglobal.com) in pounds with a 'Third Party Test Certificates' link, but names no specific laboratory in its content and shows no UK company details. A large multi-region brand with opaque sourcing.
Pharma-One Peptides sells BPC-157, AOD-9604, cagrilintide, 5-amino-1MQ and a Semax nasal spray with GBP pricing and UK shipping, ordered via a WhatsApp line (+44 7307 333532), but names no laboratory and publishes no verifiable certificate.
Polypeptides checked 16 September 2026 (fetched directly). GBP pricing confirmed across the range seen. No UK address or phone number visible on the page fetched, no lab named, no certificate of analysis link found.
Powerpeptides advertises 'All compounds undergo independent third-party lab testing before release'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Precision Peptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: also sells SARMs.
Premier Peptides UK (matching Premier Peptides UK Ltd, Companies House 17066691) sells 5-Amino-1MQ, BPC-157, MOTS-C and AOD-9604 with GBP pricing and a UK phone, but is listed at 20 Wenlock Road, London N1 7GU (a shared virtual-office address) and names no laboratory.
Premio Peptides (Bell Red Limited, Companies House 12841067) sells 26+ compounds with same-day UK dispatch and, unusually, includes a comprehensive COA (HPLC chromatograms, mass spec, amino acid analysis and endotoxin testing) with every order, saying the lab's name and accreditation are on each certificate. But the laboratory is not identified on the website itself, so you cannot verify it before ordering. Good documentation, unnamed lab. Its cited company number resolves to Bell Red Limited, a differently-named company.
Pro-Peptides sells regenerative blends (Glow, Wolverine, Klow) and growth peptides, claiming 'comprehensive batch documentation with independent analytical testing conducted where applicable' but naming no laboratory. 'Where applicable' and 'pharmacist-led standards' are marketing, not a verifiable certificate. No company details are shown.
Prolabpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Protynx Labs checked 16 September 2026 (fetched directly). UK WhatsApp contact +447903555099, no physical address found. The 'COAs' nav link exists but its contents were not readable from the fetch; needs a follow-up check before any testing claim can be verified.
Pure Peptides UK sells lyophilised research peptides (GHRP-2, Ipamorelin, IGF-1 LR3) with GBP pricing and next-day insured UK shipping, claiming 'HPLC and mass spectrometry testing' and '>99.2% validated purity', but names no laboratory and publishes no verifiable certificate.
Purepeptidesuk update, 11 September 2026: the site now says Pure Peptides UK is a trading name of Pure Progress Ltd (Companies House 10512948, Epsom, Surrey). Its batch-lookup site says reports come from 'independent third-party laboratories' and an 'ISO9001 certified' UK partner facility, but it still names no laboratory. The Purepeptidesuk site claims 'Our third-party laboratory is currently experiencing staffing shortages, which has resulted in delays to some batch testing results'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable. A previously recorded 'network' of 8 other ...peptidesuk... domains sharing one Loughborough address has been dropped: that address came only from a fuzzy Companies House keyword match against a company literally named PEPTIDESUK LTD, not from any independent evidence, and directly conflicts with this site's own Pure Progress Ltd/Epsom disclosure. Checked 11 September 2026: the other domains run different WordPress themes with different or no analytics IDs and disclose no shared company, so no real network is currently supported.
Purepeptidesuk states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
QSC Peptides UK (qsc-uk.com, shop at qscpeptide.com) is an overseas grey-market operator (Qingdao Sigma Chemical) running a UK-domestic-shipping storefront, priced in USD on the parent site, crypto-only (BTC/USDT). Its product pages embed a Janoshik COA naming QSC as both Client and Manufacturer (e.g. task #85185), which is better than most, but the certificate is a static image with no working verify link, and the task number alone does not resolve on Janoshik's server, so we could not independently confirm it. Not a UK company.
RAW Peptides sells Retatrutide, GLOW, MT2 and NAD+ with GBP pricing, but publishes no certificate of analysis, names no laboratory and shows no company address, with contact by WhatsApp and phone only. Nothing to verify.
Ranked-Peptides sells research-only peptides with fast UK delivery and a WhatsApp line, saying a 'Certificate of Analysis is available on request' and that products are '98%+ HPLC and mass spectrometry tested', but names no laboratory. No pricing is shown on-site.
Remedium Research Labs β UK-facing WordPress/WooCommerce site (GBP pricing, "Fast and discreet UK shipping", free shipping over Β£200). Distinct from the unrelated "Remedium Research" branded retatrutide pen resold as a third-party product on the-peptides-outlet.co.uk (already tracked); this is a separate direct storefront. No lab testing documentation found on the site, no Companies House number disclosed; a name search for "Remedium Research" returns no exact match on Companies House.
Researchpeptides promises 'Our products are manufactured in cGMP Compliant ISO9001 Certified state of the art laboratories to ensure our customers get the best quality'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Reta Research is a single-focus retatrutide shop (also GHK-Cu, melanotan 2 and bacteriostatic water) offering discreet next-day UK shipping at GBP prices. It states 'independent third-party analysis confirms identity, purity and composition before release' and 'Verified Purity 99% by HPLC', but no lab is named and no report is published. A near-identical domain, reta-research.co.uk, presents the same 'Research Peptides UK' branding but does not currently resolve, so the two appear to be the same or a mirrored operator. No company registration is shown.
retasupplier.co.uk discloses no company name or registration on-site; no matching Companies House entry was found under 'RetaSupplier' as of 3 September 2026. It advertises GBP pricing (Retatrutide 10mg at Β£13.65) and claims HPLC and 'Triple Mass Spectrometry' testing with a COA available on request, but names no laboratory and shows no certificate to check. Stays on the watch list until a named lab, a checkable certificate, and a disclosed company are all present.
RetatrutideStore UK retatrutideStore is a UK-facing reseller/marketplace (GBP pricing, free delivery over Β£200) stocking third-party brands such as Synedica, Remedium Research, Hygen Pharma, Adelphi Research, Alluvi, Viogen and VLS across Retatrutide, Tirzepatide, Semaglutide, NAD+, BPC-157 and TB-500. It names no testing laboratory and publishes no certificate of its own: any quality claim rests on the brands it resells, not on anything this storefront has tested or can show you. A reseller that publishes no COA is asking you to trust a chain of hands you cannot see.
Revive Peptides (matching Revive Peptides Limited, Companies House 17049124) sells BPC-157, TB-500, GHK-Cu and NAD+ with GBP pricing, fast UK delivery and a UK phone, saying products are 'tested to ensure purity', but names no laboratory and publishes no verifiable certificate.
Rndpeptides states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: barely a functioning shop.
Saxon Labs saxonlabs.co.uk ships to UK and EU customers with GBP pricing (Β£30-Β£70). It discloses no company name; no matching Companies House entry was found under 'Saxon Labs' as of 3 September 2026. Each product page shows a COA image, but no laboratory is named anywhere on-site, so there is nothing to independently verify. Stays on the watch list until a named lab and a disclosed company appear.
Starbiotechandhealth promises 'All products are supported by rigorous documentation and independent third-party testing for purity, identity, and consistency'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also pushes GLP-1 'pens'/weight-loss framing; markets to human users, not researchers.
Steroids UK is primarily a UK-domestic steroid/PED vendor with a peptides category (BPC-157 and others, sold under the third-party 'Syncom Labs' brand). It states peptides are 'lab-tested for purity and dosed exactly as labelled' but names no laboratory and provides no certificate.
supplypeptides.co.uk describes itself in its footer as a 'UK Registered Business' with UK warehouse dispatch, but no matching Companies House entry was found under 'SupplyPeptides' as of 3 September 2026, so the registration claim is unverified. It claims HPLC and mass-spec testing on every batch with a searchable COA library, but names no independent laboratory anywhere on-site. Stays on the watch list until both the company registration and a named lab can be checked.
Sussex Peptides Ltd (Companies House 16707220, Brighton, East Sussex; sussexpeptides.co.uk redirects here) sells Snap-8, AOD9604, NAD+, MOTS-c and bac water with GBP pricing, but names no laboratory and publishes no verifiable certificate.
SwissChems UK sells research peptides (a BPC-157 and TB-500 blend, ARA-290, bioregulators) alongside SARMs with GBP pricing and free UK shipping over Β£100, but names no laboratory and publishes no verifiable certificate.
Synedica (synedica-uk.shop) is the brand's storefront selling Synedica-branded retatrutide, semaglutide and NAD+ with GBP pricing, a UK phone line and free UK shipping, but names no laboratory and publishes no verifiable certificate. Same brand as synedicapeptides.co.uk.
πΈ Same operator as synedicapeptides.co.uk, same Synedica brand and operator.
SYNTECH PEPTIDES Ltd states every batch goes through HPLC and mass spectrometry with a 'β₯98% minimum purity guarantee' and a COA per batch, but names no laboratory. The company number shown on the site ('113997061') is nine digits where UK numbers are eight, so treat it as unverified. Domain registered February 2026.
Tesamorelin (Premium Research Peptides) tesamorelin.co.uk ('Premium Research Peptides') is a single-compound UK shop selling only Tesamorelin (10/20/30mg, Β£99 to Β£299) for research use, with GBP pricing, but publishes no certificate of analysis and names no laboratory. A single-compound specialist with no verifiable testing.
Tesamorelin Lab sells tesamorelin, tirzepatide, semaglutide, retatrutide and cagrilintide for 'UK laboratory research' with fast domestic delivery. It states each order is 'accompanied by a Certificate of Analysis' and is 'third-party tested', but names no independent laboratory, shows no company number and publishes no verifiable certificate. Its own site even advises buyers to 'demand a Certificate of Analysis', advice it does not itself satisfy with anything checkable.
The Peptide Cove sells research peptides and injection supplies with UK dispatch by Royal Mail Tracked, offering 'independent third-party testing results upon request', but names no laboratory. No pricing is shown on-site.
The Peptide Store (thepeptidestore.uk, Blackpool) is registered at Companies House as The Peptide Store Ltd, company number 17188723, incorporated 29 April 2026 and shown as active. It sells TB-500, GHK-Cu, MT-1, MT-2, NAD+, Tesamorelin, MOTS-C and Ipamorelin in GBP and states βthird-party testing for consistent quality and reliabilityβ, but names no laboratory and publishes no certificate of analysis.
The Peptide Supply Company no Companies House number or registered company name disclosed anywhere on site (checked Contact and Terms pages); only a Milton Keynes postcode. Testing claim names no lab. Not the same operator as peptidesupplyco.com (a distinct US-facing site, USD pricing, no UK presence) despite the similar name.
The Peptides Lab sells Retatrutide, Tirzepatide, Cagrilintide, NAD+ and Tesamorelin with GBP pricing and free UK shipping over Β£70, describing products as 'lab-tested' and 'rigorously tested to verify purity' via 'trusted manufacturing partners', but names no laboratory and publishes no verifiable certificate.
The Peptides Outlet markets its stock with the line 'A COA reflects a tested sample, not necessarily every unit sold'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Thepeptidecode promises 'Independently lab-verified research peptides with published per-batch Certificates of Analysis'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Thepeptidecompany states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust. Aggravating: pushes GLP-1 'pens'/weight-loss framing.
Thrivepeptiva states its peptides are 'third-party tested' / 'lab tested' to β₯99% but never names the lab and publishes no verifiable certificate. A purity claim with no lab, no document and no verification link is just a number on a product page, the buyer is asked to take quality entirely on trust.
Tridentpeptide's product pages read 'All our peptide batches are tested for purity by HPLC and MS-UPLC analysis and logged at the lab'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Tridentpeptides tells buyers 'Purity Level >99% (HPLC Verified)'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Tridentpeptidesuk promises 'Purity Level >99% (HPLC Verified)'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Trimfast on its own pages Trimfast says 'Each batch is independently tested by third-party laboratories, with certificates available to confirm purity and consistency on request'. It names no testing laboratory and publishes no certificate to look at, so 'independently tested' cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also pushes GLP-1 'pens'/weight-loss framing.
Tru Form Peptides Ltd (Companies House 17141033), 'a leading provider of peptides to the UK', sells Tesamorelin, GLOW and NAD+ with GBP pricing and generic '3rd party testing' claims, but names no laboratory and publishes no verifiable certificate.
Trust Peptides (operating entity Radiant Global Holdings Ltd, Companies House 15553142) sells TB-500, BPC-157, DSIP, GHK-Cu and PT-141 with GBP pricing, same-day dispatch and free delivery over Β£50, saying 'all of our peptides are tested', but names no laboratory and publishes no verifiable certificate. A registered UK entity, but the testing itself is not verifiable. Its operating company Radiant Global Holdings Ltd (15553142) was previously named 'SO DAMN TANNED! LTD' (a tanning business) until July 2025, at a Shelton Street formation-agent address.
Trusted Peptides sells BPC-157, Tirzepatide, Retatrutide and other GLP-1/GHS peptides with GBP pricing, cold shipping and free UK delivery over Β£100, saying products are 'supplied with COA', but names no laboratory and publishes no verifiable certificate.
Turbo Tan β Melanotan-focused UK seller: GBP pricing (Β£19.99βΒ£21.99), "FREE UK DELIVERY," Royal Mail Tracked 48, 1β3 day UK delivery stated. Links a Certificate of Analysis PDF in the footer but names no testing lab. Independently checked Companies House: a "TURBO TAN LIMITED" (15683564) exists but its registered business activity is machinery/equipment rental leasing, unrelated to this vendor; treated as a coincidental name match, not confirmation, so no company registration is credited.
UK Biolabs checked 11 September 2026. WordPress storefront (ukbiolabs.co.uk), org name 'UK Biolabs' in page schema, GBP pricing with free shipping over Β£50. Claims an unnamed 'UK-based partner laboratory, ISO 9001 certified' for testing but names no lab and shows no certificate to look up. No Companies House number disclosed on the pages checked; no confirmed exact-name match found.
UK Chems (ukchems.shop, possibly Research Chems Limited, Companies House 16703658) sells 17 research peptides (BPC-157, CJC-1295, TB-500, GHK-Cu, NAD+, PT-141, MOTS-c and more) with GBP pricing and free shipping over Β£50, claiming 'independent third-party batch testing' but naming no laboratory. Most lines were showing out of stock.
UK Peps sells research peptides across regenerative, weight-loss, growth and tanning categories with Royal Mail UK delivery, claiming 'premium research peptides with independent HPLC purity verification, every batch rigorously tested,' but names no laboratory and shows no company details. Batch numbers and COAs are referenced but nothing is published to verify against a named lab.
UK Peptide Co (5 Brayford Square, London E1 0SG) sells Tirzepatide, Retatrutide, Sermorelin, GHK-Cu, Tesamorelin and MOTS-C with GBP pricing, fast UK delivery and free shipping over Β£100, saying 'every batch undergoes rigorous quality verification', but names no laboratory and publishes no verifiable certificate.
UK Peptide Store sells 50+ peptides (BPC-157, Tirzepatide, Semaglutide) with GBP pricing, Royal Mail Tracked and same-day dispatch from a UK warehouse, saying products are 'HPLC-tested β₯98% purity, COA available on request' by email with batch details, but names no laboratory.
UK Peptide Supply (distinct from the separately-listed peptidesupplyuk.co.uk) sells research compounds including Melanotan 2, claiming 'carefully sourced, third-party tested' but naming no laboratory and showing no certificates on the page. It has a Trustpilot presence. Domain registered March 2026.
UK Peptides (ukpeptides.uk) lists a London address (113 Bruce Grove, N17 6UR) and sells GHRP-2, GHRP-6, Ipamorelin and Hexarelin in GBP, but names no testing laboratory and publishes no certificate of analysis. No Companies House number is shown on the site.
UK Peptides Online (409 Linthorpe Road, Middlesbrough TS5 6JN) sells BPC-157, retatrutide, IGF-1 and MT-1 with a UK address and Royal Mail dispatch, but its default pricing is in USD and it names no laboratory, claiming only 'HPLC and MS' testing with no verifiable certificate.
UK SARMs (UKS International Limited) markets itself as 'the UK & Europe's #1 SARMs supplier' and carries a genuine peptide range (GHK-Cu, MOTS-c, SNAP-8, retatrutide, Melanotan) alongside SARMs. It says products are 'tested by two third-party laboratories' but names neither. Its registered address is in Gorzow, Poland, not the UK, despite the UK-facing brand.
UK Sterling Peptides sells BPC-157, TB-500, CJC-1295, ipamorelin, SS-31, epithalon and KPV, GBP-priced and 'UK based and shipped' as a sole trader. Unusually, the site makes no reference to purity, HPLC testing, third-party analysis or certificates of any kind, so there is no testing claim to assess and nothing a buyer could independently check. No company registration is shown.
Uk Peptide promises 'UK-sourced, HPLC-verified peptides with β₯99% purity are the benchmark for reliable research data'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Uk Pharmagrade's site states 'Our peptide purity is ensured through: HPLC purification Mass spec verification Batch testing COA'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Ukpeptidesshop tells buyers 'This is why we provide 99% purity levels on our flagship products like BPC-157 and CJC-1295'. Behind that claim there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
Ultimate Peptides the Ultimate Peptide Lab Ltd (Companies House 17241799) is a live UK shop (age-gated) selling BPC-157 + TB-500, Melanotan II nasal, GLOW 70mg and bac water with GBP pricing and WhatsApp support, but names no laboratory and publishes no verifiable certificate. (Confirmed live by browser.)
Ultra Peptides UK sells 75+ compounds (TB-500, BPC-157, Tesamorelin, SS-31, PT-141, NAD+, IGF-1 LR3) with GBP pricing, UK shipping and free delivery over Β£50, saying products are 'HPLC tested with CoA verification confirmed by accredited laboratories', but names no specific laboratory.
United Kingdom Direct Peptides tells buyers 'Guaranteed +99% Purity HPLC Tested'. Behind 'HPLC testing' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. Until a lab is named and a report published, the quality claim is unverifiable.
VIA Peptides sells Retatrutide in precision-pen and nasal-spray formats, 'prepared in the UK' with 2 to 4 day UK delivery, saying 'Certificates of Analysis are available for every batch' via 'independent testing', but names no laboratory and publishes no verifiable certificate.
Verifiedpeptides update, 11 September 2026: the website currently shows only a 'Temporarily Unavailable' notice, stating that Verified Peptides is working with the MHRA (the UK medicines regulator) to ensure regulatory compliance and that the site will return once that process is complete. Its shop pages are not available while the notice is up. This records only what the site itself states. Verifiedpeptides markets its stock with the line 'Every batch is tested using HPLC and mass spectrometry to verify 99%+ purity'. It names no testing laboratory and publishes no certificate to look at, so 'HPLC testing' cannot be traced back to anyone. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence. It also leans on crypto payment (no buyer protection).
Vital Peptides Limited (Companies House 16752984) sells GLOW, KLOW, MOTS-c, NAD+ and retatrutide with GBP pricing, free delivery over Β£150 and next-business-day dispatch, but names no laboratory and publishes no verifiable certificate.
Vitalis Labs vitalis Peptide Research Ltd (Companies House 17034149), trading as 'Vitalis Labs - Peptides UK', is a live UK shop selling auto-inject pen kits (BPC-157 + TB-500, KLOW 80mg, GHK-Cu 50mg) with GBP pricing, a peptide calculator, usage guide and WhatsApp support, branding itself an 'EU compliant peptide supplier', but names no laboratory and publishes no verifiable certificate. (Confirmed live by browser.)
Vitality Life Science β UK-facing WordPress site (Β£145βΒ£295 pricing, "researchers in the UK" copy), trades as "Vitality Life Science" (VLS). Distinct from the already-tracked vitalitypeptides.co.uk, which is marked dead/parked in this ledger: a different domain and a different footer brand, not a resurrection of that listing. Claims products are "sourced from trusted manufacturers, handled under strict standards" but offers no independent verification. No Companies House number disclosed; a name search for "Vitality Life Science" returns no exact match (Vitality Life Limited 03319079 is an unrelated large insurer).
Voltranis Labs checked 11 September 2026: rrpeptides.co.uk now redirects to voltranis-labs.co.uk. Both are run by R&R Life Science Ltd (Companies House 17331722, incorporated 10 July 2026, Treharris). The rename came about two months after launch and the new site does not mention the old name. It says every product carries 'identity documentation', but no laboratory is named and no certificate is published.
VyoMax Nutrition (Megamax Limited t/a SK Sport Supplies, VAT 639017340, a Manchester bodybuilding-supplement shop) carries injectable Melanotan 2, MT2 nasal spray and a TB-500/BPC-157 blend alongside mainstream supplements, with no certificate of analysis or laboratory named for the peptide products. Primarily a supplement retailer, not a research-peptide specialist.
Wgpeptides tells buyers '99%+ purity, third-party tested with Certificates of Analysis'. Behind 'third-party tested' there is no named laboratory and no certificate you can pull up, so a buyer is asked to take the number on trust. A purity number a buyer cannot trace back to a laboratory is marketing, not evidence.
Wholesalepeptides promises 'Third-party testing is used to validate: Compound accuracy Purity and concentration Overall product integrity'. It names no testing laboratory and publishes no certificate to look at, so that claim cannot be traced back to anyone. Until a lab is named and a report published, the quality claim is unverifiable.
Zenterex (trading as Strata Sourcing Ltd, Companies House 16961416, London) is a live UK shop selling BPC-157, TB-500, GHK-Cu, NAD+, MOTS-c, Semax and Selank 'for laboratory research only', with next-day UK delivery at GBP prices. It states 'Certificates of Analysis from independent third-party laboratories are available for every product', but no independent laboratory is named and no certificate is published for inspection, so nothing about a given batch can be independently verified. The trading company is registered, but its peptide testing is not tied to any named lab.
Real lab, but not Janoshik 3
Forgepeptides on its own pages Forgepeptides says 'We reject anything under 99% purity'. The testing behind that claim is real and in the seller's own name, only it runs through a laboratory other than Janoshik. For a buyer this sits among the safer watch-list entries, since the distance from the verified list is the choice of laboratory rather than any lack of genuine testing.
Geneticresearch's product pages read 'Lab-Tested Purity Each batch undergoes third-party testing to confirm maximum purity, providing full confidence in every product you receive'. It does publish genuine third-party analysis in its own name, just through a different laboratory than the Janoshik standard this index is built on. It is one of the closest calls on the watch list: the only gap is which laboratory did the testing, not whether real testing happened.
Proforma Peptides is the cleanest of the non-Janoshik sites: it commissions genuine Certificates of Analysis from Analiza BiaΕek, a real independent lab, with itself as the client. The only mark against it is that it's Analiza, not the Janoshik standard this index is built on, so it sits just outside the independently-tested list rather than among the bad actors. Aggravating: the reports seen are dated September 2025 and served from personal Dropbox links.
Claims third-party testing, lab unnamed 3
FusionX Peptides this vendor was wrongly carried on our dead list. Re-checked 9 September 2026: the domain resolves on multiple public resolvers and the storefront serves a full trading site. The dead classification dated from the original dataset import and was never revisited, because our daily liveness check only ever re-tested active vendors.
Peptune Labs peptunelabs.com sells research peptides in Β£ with WhatsApp (+44 7397 053708), Discord and Telegram ordering. Checked 1 September 2026: the site states products are 'independent third-party lab' HPLC-tested at batch level, but no laboratory name or verification link appears anywhere, and no company registration number or address is shown despite the 'UK based' claim. Until a named independent laboratory issues a certificate in Peptune Labs' own name that can be checked on that laboratory's website, it stays on the watch list.
True Peptide Lab this vendor was wrongly carried on our dead list. Re-checked 9 September 2026: the storefront is live and trading with a working cart. The dead classification dated from the original dataset import and was never revisited, because our daily liveness check only ever re-tested active vendors.
Bot-walled, cannot be audited 1
River Peptides re-checked 9 September 2026. This vendor had been carried as dead. It resolves on 8.8.8.8, 1.1.1.1 and 9.9.9.9 and returns an HTTP response, which under our own liveness rule counts as alive. The response is a Cloudflare Turnstile challenge. We do not complete bot challenges to gather evidence, so this entry records exactly what can be established without doing so: the site is up and it is closed to inspection. It came to our attention because visitors searched this brand on our own site three times in a week while our page said it was dead.
No COA claim at all 2
Apex Peptides UK re-checked 9 September 2026 after this domain surfaced in a sweep of our own dead list. Not the same situation as a stale import: the 410 we recorded in July was real, and the site has genuinely come back under a company incorporated 19 June 2026. Our daily liveness check never re-tested dead vendors, so the relaunch was invisible to us for two months.
πΈ Same operator as peptideuk.shop, both trade as Apex Peptides (shared brand, UK phone, GBP pricing).
Warrior Peps warriorpeps.com sells research peptides in Β£ and EUR, ordered via Telegram, with GLP-RT at Β£39.99 as its stated bestseller. Checked 1 September 2026 via Companies House: Warrior P Ltd, number 17100087, incorporated 18 March 2026, registered office 25-29 Sandy Way, Yeadon, Leeds LS19 7EW. No page found on the site references third-party testing, a laboratory, or a Certificate of Analysis of any kind, a notable gap versus other vendors who at minimum claim unnamed HPLC testing. Not the same operator as the separate US-based warriorpeptides.com (different domain, US shipping cutoffs). Until testing evidence of any kind appears, it stays on the watch list.
Reseller showing the maker's certificate 1
The PED Shop (front at thepedshop.com, storefront at thepedshop.is, with .io/.net/.co.uk/.to mirrors) sells research peptides, BPC-157, TB-500, GHK-Cu, Retatrutide, Tirzepatide, Semaglutide, CJC-1295, Tesamorelin, KPV, at GBP prices with 24h UK dispatch. On its Quanta Pharma BPC-157 page it shows a Janoshik result (99.76% purity, 5.21mg content) with a genuine verification key (janoshik.com/verify, key K1CE4JZ56AKZ, tested September 2025). That is a real certificate, but it belongs to the maker, Quanta Pharma, this shop is a 'Verified Quanta Pharma Re-seller', so the testing is the supplier's, not an own-name certificate from the retailer. Weighing against it: the bulk of the catalogue is anabolic steroids (testosterone, trenbolone, masteron, dianabol, anavar) and prescription-only medicines (Modafinil, Metformin, Cialis, Viagra, Accutane, Clomid, Tamoxifen, HCG), checkout is completed by sending an order over WhatsApp, and payment is pushed toward cryptocurrency, all markers of a grey-market operation rather than a transparent research-peptide supplier.
No verifiable third-party testing 1
Revexa (revexa.co.uk) is a UK peptide seller trading from 20 Wenlock Road, London N1 7GU, with WhatsApp contact (+44 7356 114977) and a Wix storefront. Checked 31 August 2026: full site crawl (nav + all linked pages) found no COA page, no lab-results page, and no mention of any named testing laboratory or purity percentage backed by a linkable certificate. Until a named independent lab issues a certificate in Revexa's own name that can be checked on that lab's own site, it stays on the watch list.
No verifiable third-party testing; mixed peptide/steroid catalogue 1
UK Peptides (ukpeptides.is) is a WooCommerce storefront selling research peptides and, on the same shop page, unlicensed injectable anabolic steroids under brand names like Cypiomax, Decadura and Primo-depot, a combination that is a red flag in itself, separate from the testing question. Checked 31 August 2026: FAQ and full nav crawl found no COA/lab-results page and no named independent laboratory anywhere on the site, despite repeated on-page purity and testing claims. Until a named lab publishes a certificate in UK Peptides' own name, it stays on the watch list.
No registration, no named lab 2
Chemco Medical checked 10 September 2026: the About, Contact and Contact Us pages show no registered company, no company number and no postal address, and a Companies House search for Chemco Medical returns no matching company. No laboratory or Janoshik verify link appears anywhere on the site.
Peptide Shop UK peptidesshopuk.com sells research peptides from Β£4.99 to Β£149.99 with a WhatsApp chat widget for ordering. Checked 1 September 2026: 'third-party laboratory testing' is claimed but no lab is named and no certificate documents are linked; no Companies House number or registered address appears anywhere on the site. Until a named independent laboratory issues a certificate in Peptide Shop UK's own name, and a company registration is disclosed, it stays on the watch list.
Young company, no named lab 7
extolx.co.uk sells research peptides, stating purity of β₯99% on product pages. Checked 2 September 2026 via Companies House: ExtolX Limited, number 17314659, England & Wales, active. No laboratory name or third-party verify link found on the site. Stays on the watch list until a named independent lab result appears.
Future Peptides futureproofpeptides.com sells research peptides with GBP pricing. Checked 3 September 2026 via Companies House: Future Peptides Ltd, number 17381669, active, incorporated 4 August 2026, registered office 28 Blueberry Way, Woodville, Swadlincote, England DE11 7GX. The site claims HPLC purity testing but does not name the laboratory. Until a named independent laboratory issues a certificate in Future Peptides' own name, it stays on the watch list.
helixara.co.uk sells research peptides under a "Purity Guaranteed >99%" banner. Checked 2 September 2026 via Companies House: Helixara Ltd, number 17119871, England & Wales, active. No laboratory name or third-party verify link found on the site. Stays on the watch list until a named independent lab result appears.
N9 Biotech checked 11 September 2026. Part of Nimbus9 Group Limited (Companies House 17199136, incorporated 5 May 2026) at a London EC1V 2NX registered-office address used by many unrelated companies. Contact via Telegram and WhatsApp. Domain registered 5 May 2026; n9biotech.co.uk shows 'Coming Soon'.
Pegasus Peptides pegasus-peptides.com sells research peptides with same-day UK dispatch. Checked 2 September 2026 via Companies House: Pegasus Peptides Ltd, number 17240989, UK, active. The site claims HPLC & MS verification and offers a COA on request, but no laboratory is named and no certificate is published on-site. Stays on the watch list until a named independent lab result is published.
peptidesnextday.co.uk sells research peptides from Β£4.99 to Β£59 with next-day UK dispatch for orders before 15:00. Checked 1 September 2026 via Companies House: Dantix Systems Ltd, number 16710533, active, incorporated 11 September 2025 as Studiofaction Ltd and renamed May 2026, registered office 20 Wenlock Road, London N1 7GU (a mass company-formation address). The site's 'batch files'/'lab reports' section does not name a laboratory. Until a named independent laboratory issues a certificate in PeptidesNextDay's own name, it stays on the watch list.
Surge Solutions surgesolutions.shop sells research peptides via a Shopify storefront. Checked 2 September 2026 via Companies House: SRG Trading Ltd, number 16786788, active, registered office 167-169 Great Portland Street, London W1W 5PF. Company number 16786788 is also cited directly on-site. Product pages show test-report images but no laboratory name or verify link. Until a named independent laboratory issues a certificate in Surge Solutions' own name, it stays on the watch list.
No COA claim, discloses this openly 1
North Scientific northscientific.co.uk sells research peptides. Checked 2 September 2026 via Companies House: KF01 Ltd, number 17130830, active, registered office in Romford. The site states directly that it does not publish third-party COAs or purity data. Stays on the watch list; would need a named independent lab result to move further.
Company dissolved, still trading 1
ROK Chem β Sells a raw research-grade GHK-Cu peptide powder (Β£24.95+) alongside skincare, states "developed, formulated and produced in the UK," free UK shipping. Only a bare "99.9% purity" claim, no CoA or testing lab named. Independently confirmed on Companies House: the disclosed entity "ROK CHEMICAL SUPPLIES LIMITED" (13782325) was Dissolved on 28 July 2026, yet the storefront is live and still taking orders as of 6 September 2026: a registered-company-dissolved-but-still-trading pattern, a higher-risk signal than a simple thin-evidence watch listing.
Claims testing but names no lab 12
BuyReta checked 11 September 2026. A retatrutide-focused shop priced in pounds that takes cryptocurrency only and routes contact through Telegram and WhatsApp. Its terms give a London WC2H 9JQ address, a registered-office address used by many unrelated companies, and name no company. A .com copy (buyretaeu.com, registered 20 August 2026) shows the same site.
Direct Peptides (.uk) β A distinct WordPress site from the already-tracked direct-peptides.com (different site architecture, organisation schema and publish date; independently confirmed not the same operator). Claims "Certificate of Analysis," HPLC and "third-party tested" but never names the lab or links a verifiable report. No Companies House number disclosed. Bank transfer, Bitcoin/crypto, WhatsApp accepted.
Elevr checked 11 September 2026. The site says it is 'Elevr Ltd, a registered UK company' shipping to the UK and Europe; Companies House has no company of exactly that name (an Elevr Health and Wellbeing Limited, incorporated February 2026, may or may not be related). Card payments including Apple Pay. Domain registered 18 February 2026; elevr.co.uk is an empty page.
Optimus Labs checked 11 September 2026. Trades as Optimus Future Ltd (Companies House 17126312, incorporated 30 March 2026) from a Mayfair address, W1S 4JL, used by many unrelated companies. International orders via WhatsApp. Domain registered 17 January 2026.
PEPS IOW checked 11 September 2026. The only document on the site is a terms PDF. No company or address is stated; support runs through Telegram. Domain registered 11 July 2026.
PS Labs checked 11 September 2026. PS Research Labs Ltd was incorporated on 8 July 2026 (Companies House 17327405, Herefordshire HR5 3DJ); the domain was registered on 14 June 2026. Runs an affiliate programme. Payment method not recorded.
Peptides Direct (.uk) β UK-facing site (GBP pricing, Royal Mail Tracked 24 shipping), sells BPC-157, MOTS-C, GHK-Cu, Retatrutide. Claims "every order ships with its certificate of analysis" and "Independent lab" HPLC testing, but never names the testing lab or links a verifiable report. No Companies House number disclosed.
Performance Peptides checked 11 September 2026. The domain was registered on 15 April 2026, five months before we checked, which sits oddly with the '14k+ orders shipped' claim. No company or address is stated; orders via WhatsApp.
Reta Lab UK β UK-facing site (GBP pricing), styles itself the UK's "Most Trusted Research Peptide Wholesaler," sells retatrutide/tirzepatide/semaglutide. Claims "Independent Lab" HPLC testing but does not name the lab or link a verifiable report. No Companies House number disclosed; WhatsApp is the only contact method shown.
Veridian-Labs checked 11 September 2026. The footer reads 'Veridian Labs Ltd, 71-75 Shelton Street, London WC2H 9JQ', a registered-office address used by many unrelated companies; the only Veridian Labs Ltd at Companies House (17254564, incorporated 1 June 2026) is registered in Bolton, BL5 3TX, which is the address given by a different site, veridianlabs.co.uk. Contact via Telegram. Domain registered 1 July 2026.
VeridianLabs checked 11 September 2026. VeridianLabs Ltd is Companies House 17254564, incorporated 1 June 2026, Bolton BL5 3TX; the domain was registered the following day. Bank transfer only; the site sits behind an age gate. Not to be confused with veridian-labs.co.uk, a separate site using the same company name at a London address.
World of Peptides checked 11 September 2026. Card payments via Stripe and support over WhatsApp; no company or address is stated. Domain registered 17 April 2026.
Other lab (not Janoshik) 1
ZENTRA Peptides checked 11 September 2026. Zentra Brands Limited is Companies House 17212134, incorporated 11 May 2026, Surrey CR8 5NH; zentra-peptides.co.uk redirects to this .com. Runs an ambassador and rewards programme and carries a Trustpilot widget. Freedom Diagnostics reports are looked up by search code on that lab's own site rather than by a public task number.
Name-drops testing labs with nothing behind it 1
new-u.io's /buy-peptides-uk page targets UK buyers with GBP pricing and delivery details for England, Scotland, Wales and Northern Ireland, and claims 'every batch independently verified by Janoshik Analytics or Freedom Diagnostics by HPLC with mass spec confirmation and a batch-linked Certificate of Analysis', but no certificate, task number or verification link is shown anywhere. Its own footer states the site is 'operated by Hilxera Distribution Services LLC, registered in Wyoming, ID: 2026-001928701', principal office in Cheyenne, WY, USA: the operator behind this UK-targeted page is a US company, not a UK one.
Testing claimed, not yet evidenced 4
Apex Peptides checked 16 September 2026 (fetched directly). No UK address or phone found, only '24/7 support'. Not to be confused with apexpeptide.com, a similarly-named domain that currently resolves to a HugeDomains for-sale/parked page; the relationship between the two, if any, could not be confirmed from either site's content, so apexpeptide.com is not treated as the same vendor.
Limitless Vitality checked 15 September 2026 (fetched directly). UK-only shipping, flat Β£4.99 or free over Β£115. Trustpilot, Instagram and TikTok links present on-site. No Companies House registration number or legal entity name found on the pages checked. Nothing here can currently be verified against a named laboratory or a Janoshik-style report.
Nugenyx checked 16 September 2026 (fetched directly). GBP pricing and UK delivery language confirmed; UK WhatsApp number +447576520069 shown, no physical address. Note: the domain nugenyx.co.uk is already in this ledger, tier dead, and was independently reconfirmed today as a parked/for-sale lander page (GoDaddy-style parking system), not a working shop, so it is not the same live site; nugenyx.com may be a rebrand onto a new TLD or an unrelated operator using the same name, and this record treats it as a separate, currently-live site pending further evidence.
ReadyPep checked 16 September 2026 (fetched directly). GBP pricing confirmed, UK WhatsApp number +447494478887, contact emails on the domain (research@, lab@), no physical address. Orders appear to route through WhatsApp rather than a standard checkout, a process quirk worth noting rather than a verification claim.
Self-tested, not independent 1
Futura Biolabs checked 16 September 2026 (fetched directly, including the /certificates page). Footer shows 'United Kingdom' and [email protected], no street address or phone. The certificates page lists compounds as Verified/Pending with 'Download CoA' links attributed to the seller's own lab, not a named independent laboratory such as Janoshik; no verify.janoshik.com or equivalent third-party link found.
The rule. A Certificate of Analysis is meaningful only if an independent laboratory tested that seller's own batch and you can verify it. In-house tests, "COA on request" promises, unnamed "accredited" labs, factory QC sheets and borrowed certificates all fail this test. If you cannot verify a current Janoshik report in the seller's own name, do not buy.
Frequently asked questions
Which UK research-peptide vendors publish their own verified Janoshik certificate of analysis?
As of 16 September 2026, 28 of the 379 active UK research-peptide retailers The Peptide Watch tracks publish their own verifiable Janoshik certificate of analysis, a report from the independent laboratory Janoshik Analytical that names the vendor itself as the client and can be checked on Janoshik's official website. Ranked by most recent certificate, they are: Lab77Peptides (Aug 2026), Imperialpeptides (Aug 2026), Regenix Peptides (Aug 2026), Apex Pharma (Jul 2026), Claripep (Jul 2026), Novex Labs (Jul 2026), Peptide Biosciences (Jun 2026), Biohacklondon (Jun 2026), Velonix Labs (Jun 2026), Liverpool Advanced Biosciences (LAB.LTD) (Jun 2026), Grey Matter Peptides (Jun 2026), Kingston Peptides (Jun 2026), Simplypeptides (May 2026), Kensingtonlabs (May 2026), Reta24 (May 2026), Intel Peptides (May 2026), BioVanta Research (May 2026), Phoenixbiolabs (May 2026), Peptideprime (May 2026), Peptidesresearch (May 2026), Peptifyuk (May 2026), Momentumpeptides (May 2026), Unionbiolabs (Apr 2026), Xlpeptides (Apr 2026), Bodylab Store (Apr 2026), Ascendpeptidesuk (Apr 2026), Tested Peptides (Jan 2026), Wolverinepeptides (no own-name report read).
What percentage of UK research-peptide vendors are independently lab-tested?
Just 7%. The Peptide Watch found that only 28 of the 379 active UK research-peptide vendors it audits, about 7%, publish their own verifiable Janoshik certificate of analysis: a report from the independent laboratory Janoshik Analytical that names the vendor itself as the client and can be checked on Janoshik's own website. The other 93% (351 sellers) show no certificate, a borrowed one, a self-made in-house one, or one that cannot be independently verified.
Can The Peptide Watch prove a peptide is genuine, or what is really in the vial I receive?
No, and neither can anyone else from documents alone. Confirming what is actually in the vial you receive would require independently testing that exact unit; no certificate, and no website, can do that. What The Peptide Watch checks is the credibility of a seller's evidence: whether an independent laboratory is named, whether the certificate names the seller itself as the client, and whether it can be verified on the laboratory's own website. A genuine certificate proves a sample was tested once, not that your batch matches it. The Peptide Watch filters out fakes, borrowed certificates and undocumented sellers and so reduces uncertainty; it does not eliminate risk, and it is one signal to weigh alongside independent testing and consistent results across buyers over time.
What is Janoshik and why is a Janoshik COA the gold standard for research peptides?
Janoshik Analytical is an independent analytical laboratory widely used in the research-peptide industry to test compound identity and purity by HPLC and mass spectrometry. It is considered the gold standard because every genuine Janoshik test report carries a unique verification code that can be entered on Janoshik's official website (janoshik.com/verify) to confirm the report is authentic and unaltered, so a Janoshik certificate cannot be faked or edited, unlike a printed or screenshotted document.
Is there a UK laboratory that tests research peptides? Are UK peptides tested in the UK?
No verified certificate in this audit was issued by a UK laboratory. The independent labs that legitimate UK vendors actually use are based abroad, Janoshik Analytical in Prague, Czech Republic, and Analiza BiaΕek in Poland. When a UK seller claims testing by an unnamed 'accredited UK laboratory', there is no verifiable UK body behind the claim. The vendors that genuinely test send samples to Janoshik and publish a report that can be checked on Janoshik's own website.
What is a Certificate of Analysis (COA) for research peptides?
A Certificate of Analysis is a laboratory report stating what a specific batch of a peptide actually contains: the compound's identity, its purity (usually a percentage), and screening for contaminants such as heavy metals and bacterial endotoxins. Because peptide purity cannot be judged by sight, an independent COA is the only objective evidence of what is in a vial.
Why does it matter if a research peptide is independently tested?
Without an independent test there is no way to know what a vial actually contains. An untested peptide may be the wrong compound, a fraction of the labelled dose, or contaminated with heavy metals or bacterial endotoxins, none of which can be judged by appearance, price or packaging. An independent, verifiable certificate of analysis is the only objective evidence that the contents match the label.
How can I verify that a peptide Certificate of Analysis is genuine and belongs to the seller?
Check four things. First, an independent laboratory must be named (in-house testing does not count). Second, the certificate's client field must name the seller itself, not its supplier or another brand. Third, the test must be recent, because a certificate only covers the single batch that was tested. Fourth, you must be able to verify it on the laboratory's own website. If any of these fail, the certificate is not reliable evidence.
Why does the date on a peptide COA matter?
A Certificate of Analysis only covers the one batch that was tested. Research-peptide sellers re-order stock frequently, and each new batch is a separate production run that was never tested. A certificate from many months ago therefore says little about the vial shipped today. The more recent the certificate, the more likely the vial received is from the batch that was actually tested; an old or undated certificate carries little weight.
What does it mean when a peptide vendor displays a COA that names a different company?
It means the certificate is borrowed. Some sellers display a genuine Janoshik report to appear legitimate, but the client named on the certificate is their wholesale supplier or another brand, not the seller. Such a certificate proves a sample from someone else's production line was tested once; it is not evidence of what the seller itself ships.
How can I tell if a UK research-peptide vendor is trustworthy?
Find the vendor's Certificate of Analysis and confirm all of the following: it comes from a named independent laboratory (ideally Janoshik); the certificate names the vendor itself as the client; the test is recent; and it can be verified on the laboratory's website. If a vendor relies on in-house testing, an unnamed 'accredited UK lab', a 'COA on request' promise, a factory QC sheet, or a borrowed certificate, it does not meet this standard.
How many UK research-peptide vendors are there, and how many are independently tested?
The Peptide Watch has audited 523 UK research-peptide domains. Of these, 379 are active retailers, 96 are dead or parked, and 48 are out of scope. Among the active retailers, only 28 (about 7%) publish their own verifiable Janoshik certificate of analysis; the other 351 publish no certificate that can be independently verified in their own name.
What is The Peptide Watch?
The Peptide Watch is an independent UK research-peptide intelligence project. It audits every UK research-peptide website, records whether each publishes a certificate of analysis that can be verified in its own name, and re-checks them daily. The Peptide Watch does not sell peptides, takes no payment from vendors, and links to none of them, it publishes information, not advertising.
Methodology & about
The Peptide Watch audits every identifiable UK research-peptide website by opening each vendor's published certificates of analysis and reading the testing laboratory and the client named on the certificate, benchmarking its pricing against the market on a single common compound, BPC-157, expressed as Β£ per milligram, so every provider is compared like-for-like, and checking its advertising and operator links; and by re-scanning regularly. A vendor is listed as verified only when it publishes a Janoshik certificate that names the vendor itself as the client and can be verified on Janoshik's website. The Peptide Watch is independent, sells no peptides, accepts no payment from vendors, and links to none of them. Verdicts state observable facts. Research use only, no medical, therapeutic or health claims.
β οΈ Is anything on The Peptide Watch wrong or out of date? Submit a correction request and we'll look into it, vendors welcome too.