Where to buy TB-500 (Thymosin Beta-4 fragment) in the UK: the sellers with a verifiable COA

The newest verifiable TB-500 certificate on any UK seller's website is on Biovanta (biovanta.store), analysed 18 Sep 2026 (task #229703 on Janoshik's site); 16 verified sellers hold one covering TB-500, listed newest first below. Of the 446 active UK sellers we audit, 38 (9%) publish their own verifiable Janoshik certificate of analysis, and this page lists which of them hold one covering TB-500, newest certificate first. It is a record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them. TB-500 is a synthetic fragment of the naturally occurring protein Thymosin Beta-4, studied in research on cell migration and angiogenesis. Because it is usually sold alongside BPC-157, it inherits exactly the same certificate problems. Purity and identity cannot be judged by eye, so an independent certificate you can check is the only real proof of what is in the vial.

The one test that matters for TB-500

Ignore the marketing. The question is simple: does the seller publish a verifiable Janoshik certificate that names the seller itself as the client? If it does, you can confirm an independent lab tested that batch. If it shows an in-house document, a borrowed certificate, or "COA on request", you cannot. Learn the two-minute check in how to verify a Janoshik COA.

Which UK sellers publish a verifiable COA

Of the 446 active UK research-peptide sellers we audit, only 38 (9%) publish their own verifiable Janoshik certificate. Any of them is where you can actually verify testing, for TB-500 or any compound. A few: Lab77Peptides · Peptology Labs · Biovanta · Camo Chem · Biohackpeptides · Zenic Labs. See the full independently-tested list, or check a specific shop's certificate with the free COA Checker.

Verified UK vendors with a confirmed TB-500 Janoshik certificate (16)

1. Biovanta biovanta.store · newest TB-500 report 18 Sep 2026 · task #229703
2. Camo Chem camochem.uk · newest TB-500 report 11 Sep 2026 · task #229223
3. Biohackpeptides biohackpeptides.co.uk · newest TB-500 report 9 Sep 2026 · task #227606
4. Peptology Labs peptologylabs.uk · newest TB-500 report 4 Sep 2026 · task #229648
5. Lab77Peptides lab77peptides.uk · newest TB-500 report 6 Aug 2026 · task #208428
6. Imperialpeptides imperialpeptides.co.uk · newest TB-500 report 6 Aug 2026 · task #214255
7. Biohacklondon biohacklondon.com · newest TB-500 report 23 Jun 2026 · task #168490
8. Kingston Peptides kingstonpeptides.com · newest TB-500 report 4 Jun 2026 · task #162965
9. Reta24 reta24.co.uk · newest TB-500 report 22 May 2026 · task #135278
10. Phoenixbiolabs phoenixbiolabs.net · newest TB-500 report 13 May 2026 · task #147248
11. Peptifyuk peptifyuk.com · newest TB-500 report 11 May 2026 · task #149061
12. Ascendpeptidesuk ascendpeptidesuk.com · newest TB-500 report 27 Mar 2026 · task #125456
13. Xlpeptides xlpeptides.com · newest TB-500 report 23 Mar 2026 · task #124102
14. Clinicore clinicore.co.uk · newest TB-500 report 19 Jan 2026 · task #100583
15. Tested Peptides testedpeptides.co.uk · newest TB-500 report 8 Jan 2026 · task #97473
16. Thoroughbredlabs thoroughbredlabs.co.uk · newest TB-500 report 6 Oct 2025 · task #82053

Audit findings, not recommendations. Every entry is a report covering TB-500 that we opened on Janoshik's own site and that names the seller itself as the client; the date is the analysis date printed on the report where we have read it, otherwise the date the laboratory received the sample. The table below is the same ledger in full, so the two always agree. Not exhaustive: a vendor whose TB-500 report we have not yet read is not listed.

The 38 verifiable TB-500 certificates we have read, newest first

Each row was opened on Janoshik's own site by a real page load and transcribed. The client column is the name the laboratory printed; a certificate counts as a seller's own only when that name is the seller. The report date is the analysis date printed on the report where we have read it, otherwise the date the laboratory received the sample. The verify link opens the laboratory, never the shop. Audit findings, not recommendations.

What the 38 TB-500 certificates show

We have read 38 Janoshik reports covering TB-500, published by 16 UK sellers. Each was opened on Janoshik's own website. 37 of the 38 name the seller itself as the client; the client column in the table above shows the name on the rest. 23 of the 38 are dated within the last six months and 1 is more than a year old. The newest is dated 18 Sep 2026 and the oldest 28 Jan 2025.

13 of the reports give a purity figure for TB-500. The figures run from 96.593% to 99.945%, and 10 of the 13 are at 99% or above. 18 more give the amount recovered and no purity figure for it, which is usual where the vial holds a blend. 7 reports test for heavy metals or endotoxins instead. A purity figure describes the sample the laboratory received, not every vial from that batch.

Read directly from the newest reports: Camo Chem: task #229223, analysed 11 Sep 2026, 5.27 mg recovered at 96.593%, client Camo Chem UK; Imperialpeptides: task #214255, analysed 6 Aug 2026, 5.48 mg recovered at 98.750%, client Imperial Peptides UK; Lab77Peptides: task #208428, analysed 6 Aug 2026, 10.96 mg recovered at 99.020%, client Lab77peptides.co.uk.

A certificate is a batch document. The lines that matter are the compound (it must say TB-500, not only a batch code), the client (the shop, not its supplier) and the analysis date. A new batch is untested until a new report appears.

Questions people ask

TB-500 in the UK at a glance

Counted from the vendor ledger at build time: a seller is included when its audit records TB-500 in its certificates or its catalogue notes. Audit findings, not recommendations.

The other 56 sellers: what they publish instead

• No named lab, nothing to verify: 25
• 'COA on request', nothing published: 4
• Hides behind an 'accredited UK lab': 3
• No lab named: 3
• Name-drops Janoshik with nothing behind it: 2
• Testing claimed, not yet evidenced: 2

Each pattern is explained on the seller's own audit page, with what we saw and the date. The A-Z directory lists every seller.

The market for TB-500 in the UK

Advertising. Google's Ads Transparency Centre shows 2 of these sellers running ads: Peptifyuk, Thoroughbredlabs. Paid reach is where a new buyer meets a brand before meeting any certificate.

Companies. 24 of the 74 can be matched to a Companies House record; the median company is 10 months old and 14 were incorporated within the last year. A seller with no traceable company is not necessarily dishonest, but there is nobody to hold to its certificate.

Reviews. 20 of the 74 have a Trustpilot profile with a score; the median is 4.3, 8 sit at 4.5 or above and 1 below 3.0. A review score says who collects reviews, not who tests, which is why it sits next to a certificate and never instead of one.

Changes among TB-500 sellers

• 2026-09-29 Biovanta (biovanta.store) added to the audit on the verified list.
• 2026-09-29 UK Sterling Peptides (uksterlingpeptides.com) left the audit (closed, parked, or out of scope).
• 2026-09-29 Buy British Peptides (buybritishpeptides.com) added to the audit on the watch list.
• 2026-09-29 Peptide Origin (peptideorigin.com) added to the audit on the watch list.
• 2026-09-29 Apexion Biolabs (apexionbiolabs.co.uk) added to the audit on the watch list.
• 2026-09-29 Apex Biolabs UK (apexbiolabsuk.co.uk) added to the audit on the watch list.

From the site changelog, which also runs as a JSON feed.

What the research shows for TB-500, and what it does not

Most of the evidence is about a different molecule. Thymosin beta-4 is a 43-amino-acid protein your own cells make, and it has a large literature: 937 PubMed papers and 3 clinical trials, including a placebo-controlled intravenous safety study in healthy volunteers and a venous-ulcer trial, both from 2010. TB-500 is a short synthetic fragment of it. Only 31 papers name TB-500 at all, and most of those are reviews or doping-detection methods, not studies of the fragment itself.

The fragment's own evidence is thin and recent. The clearest study of TB-500 as sold is a 2026 rat Achilles-tendon experiment that combined it with BPC-157. There is no human trial of TB-500, so any claim that the full protein's results transfer to the fragment is an assumption, not a finding.

It is a banned substance in sport. WADA's 2026 Prohibited List names "Thymosin-β4 and its derivatives e.g. TB-500" under S2.3, growth factors and growth factor modulators, a class prohibited at all times, in and out of competition. Buyers who are tested athletes should know that before they read any certificate.

Who owns TB-500, and where it stands

Counts are from PubMed on 15 September 2026 using the queries recorded in our evidence file; "clinical trial" is PubMed's own publication-type index. This is a description of the published record, not medical advice and not an argument for or against use.

The Peptide Watch's position on TB-500

Not a licensed medicine in the UK. Prohibited in sport at all times under WADA S2.3. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy TB-500. Sellers on this page are listed by the date of their newest TB-500 certificate and by nothing else. If you can verify a seller's testing, you can at least judge its evidence; if you cannot, you are taking the seller's word for what is in the vial. See how UK testing compares across every seller in the market statistics.

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