Is Pureline Biolabs legit? An independent review
Pureline Biolabs is independently tested: its certificate is genuinely its own and verifiable, one of only 39 of 548 UK vendors that pass.
- Certificate
- Janoshik, in the seller's own name · 11 reports read · newest analysed 2 September 2026 · see the reports
- Official website
- purelinebiolabs.co.uk
- Payment
- Bank only
- Buyer reports
- Coming soon, visible from 1 November 2026 · tell us about your order
Checked daily against the seller's site, the laboratory's site and the public record. If this seller publishes new evidence, tell us and it is re-checked. Method · data · correction
New Since 13 October 2026 you can tell us how your order went. Reports go up on this page from 1 November 2026, bad ones as well as good, because UK law doesn't let review sites hide negative reviews. A written note appears only after we have read it.
Tap one to start, about 30 seconds.
11 reports we opened on Janoshik's site
Each row was opened by a real page load on verify.janoshik.com and transcribed. The client column is the name the laboratory printed. Newest first. Audit findings, not recommendations.
| Task | Sample | Test | Client on the report | Received | Result | |
|---|---|---|---|---|---|---|
| #226522 | Retatrutide | purity | Pureline Biolabs Ltd. | 31 Aug 2026 | Retatrutide · 18.36 mg · 99.763% | verify |
| #226521 | Retatrutide | purity | Pureline Biolabs Ltd. | 31 Aug 2026 | Retatrutide · 13.51 mg · 99.515% | verify |
| #209947 | GHK-cu - 50mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | GHK-Cu · 52.64 mg (GHK 43.66 mg, copper 8.98 mg) · 99.700% | verify |
| #209946 | PT-141 - 10mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | PT-141 · 9.65 mg · 99.874% | verify |
| #209945 | KVP - 10mg | purity | Pureline Biolabs Ltd. | 22 Jul 2026 | KPV · 9.82 mg · 98.015% | verify |
| #209944 | Kisspeptin - 10mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | Kisspeptin · 10.60 mg · 99.890% | verify |
| #209942 | MOTS-c - 10mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | MOTS-c · 11.23 mg · 98.123% | verify |
| #209941 | Semax - 5mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | Semax · 5.28 mg · 98.938% | verify |
| #209940 | Selank - 10mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | Selank · 10.43 mg · 98.913% | verify |
| #209939 | Melanotan 1 - 10MG | purity | Pureline Biolabs Ltd | 22 Jul 2026 | Melanotan 1 · 8.13 mg · 99.805% | verify |
| #209938 | Ipamorelin - 5mg | purity | Pureline Biolabs Ltd | 22 Jul 2026 | Ipamorelin · 4.89 mg · 99.541% | verify |
How we read the certificate
How buyer reports work
- Every report is confirmed by email before it counts, and each email address can report on a seller once every 90 days.
- We hold back anything that looks like a seller reviewing itself: an email from the seller's own domain, several reports from the same connection, or a sudden burst in a day. A person checks those before anything shows.
- Tick-box answers are shown only as totals. A written comment appears after a person has read it, exactly as the buyer wrote it: we don't edit comments or hold them back, good or bad, and UK consumer law (the Digital Markets, Competition and Consumers Act 2024) doesn't let review sites hide negative reviews. The only thing we take out is personal details, such as a name, phone number or email address.
- Sellers can reply. If a seller disagrees with what buyers report, it can email [email protected] from its own domain, and we show one response next to the totals, with the date.
- No single thing on this page should decide it. Look at the lab reports, the buyer reports and how you'd pay, together.
Questions people ask about Pureline Biolabs
Is Pureline Biolabs legit?
On The Peptide Watch's independent audit, Pureline Biolabs (purelinebiolabs.co.uk) publishes its own verifiable Janoshik certificate of analysis that names Pureline Biolabs itself as the client, so its testing can be checked on Janoshik's own website. That is the strongest evidence standard we track. It confirms the credibility of the seller's evidence, not any individual vial you receive.
Does Pureline Biolabs publish a real Certificate of Analysis?
Yes. Its most recent own-name Janoshik certificate is dated Sep 2026 and can be verified on Janoshik's website by its unique code, so the purity result cannot be faked or edited.
How do I check Pureline Biolabs's certificate myself?
Find the certificate on purelinebiolabs.co.uk and read four things: an independent laboratory is named; the client field names Pureline Biolabs, not a supplier; the compound line names the peptide you are buying, not only a batch code; and the report opens on the laboratory's own website from its task number and key (verify.janoshik.com for Janoshik). Then compare the batch number on the report with the one on your vial. The free COA Checker on this site runs the first three checks on a photo of the certificate.
Show buyers you are independently verified
Pureline Biolabs is one of only 39 UK vendors whose testing The Peptide Watch could independently verify. If that is you, display this badge: it links back to this audit. No fee and no catch, verified vendors are welcome to use it. It keeps itself up to date: it shows as verified only while this listing is verified.
<a href="https://thepeptidewatch.com/vendor/purelinebiolabs-co-uk" target="_blank" rel="noopener"><img src="https://thepeptidewatch.com/badge/purelinebiolabs-co-uk.svg" alt="Verified by The Peptide Watch" width="272" height="48" style="border:0"></a>