Is Pureline Biolabs legit? An independent review
Pureline Biolabs publishes eleven own-name Janoshik certificates, the newest test #226521 (retatrutide at 99.515%, 13.51 mg recovered, batch PLB-003, analysed 2 September 2026), which names Pureline Biolabs Ltd as the client and verifies on Janoshik's website; the others cover ipamorelin, melanotan 1, selank, semax, MOTS-c, kisspeptin, KPV, PT-141 and GHK-Cu. It holds the most recent verified certificate in this index, so it sorts first in a list ranked by certificate date.
Verified facts at a glance
| Fact | What we found | How it was checked |
|---|---|---|
| Standard applied | own-name verifiable-COA standard | how every vendor is judged, methodology |
| Certificate | ✅ genuine Janoshik, own name | read on the seller's own site |
| Latest certificate date | Sep 2026 | as printed on the report |
| UK company registration | May 2026 · 4 months old | Companies House public record |
| This audit as data | /data/vendor/purelinebiolabs-co-uk.json | same record the open dataset serves, re-checked daily |
The certificate
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 |
Show buyers you are independently verified
Pureline Biolabs is one of only 32 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>
Pricing vs the market, benchmarked on BPC-157
The Peptide Watch benchmarks every vendor on the same compound, BPC-157, the most common research peptide, as £ per milligram, so prices are directly comparable across all providers. No public BPC-157 price feed was available for this vendor at audit.
Payment
Is Pureline Biolabs legit? The questions people ask
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.
Can I trust Pureline Biolabs, and is it a good supplier?
Its lab evidence is independently verifiable, which is the best signal a paper trail can give. Even a genuine certificate proves a sample was tested once, not that your specific batch matches it, so weigh it alongside consistent results over time.
Is Pureline Biolabs a scam?
Nothing in this audit indicates that. Pureline Biolabs shows a verifiable own-name Janoshik certificate, the opposite of the borrowed or self-made certificates the watch list flags. Judge it on that checkable evidence rather than the word 'scam'.
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.
Related vendors
The Peptide Watch. "Is Pureline Biolabs legit? Independent review & COA audit." Verified 15 September 2026. https://thepeptidewatch.com/vendor/purelinebiolabs-co-uk