Where to buy PT-141 (Bremelanotide) in the UK: the sellers with a verifiable COA
The newest verifiable PT-141 certificate on any UK seller's website is on Peptology Labs (peptologylabs.uk), analysed 18 Sep 2026 (task #233900 on Janoshik's site); 7 verified sellers hold one covering PT-141, listed newest first below. Of the 450 active UK sellers we audit, 38 (8%) publish their own verifiable Janoshik certificate of analysis, and this page lists which of them hold one covering PT-141, 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. PT-141 is a synthetic melanocortin peptide studied in sexual-function research. Check whether a seller's certificate names PT-141 specifically and lists the seller itself as the client. 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 PT-141
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 450 active UK research-peptide sellers we audit, only 38 (8%) publish their own verifiable Janoshik certificate. Any of them is where you can actually verify testing, for PT-141 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 PT-141 Janoshik certificate (7)
- Peptology Labs peptologylabs.uk · newest PT-141 report 18 Sep 2026 · task #233900
- Camo Chem camochem.uk · newest PT-141 report 14 Sep 2026 · task #229227
- Pureline Biolabs purelinebiolabs.co.uk · newest PT-141 report 22 Jul 2026 · task #209946
- Imperialpeptides imperialpeptides.co.uk · newest PT-141 report 20 Jul 2026 · task #208632
- Clinicore clinicore.co.uk · newest PT-141 report 5 Feb 2026 · task #105655
- Kensingtonlabs kensingtonlabs.co.uk · newest PT-141 report 4 Nov 2025 · task #85945
- Xlpeptides xlpeptides.com · newest PT-141 report 22 Aug 2025 · task #76135
Audit findings, not recommendations. Every entry is a report covering PT-141 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 PT-141 report we have not yet read is not listed.
The 12 verifiable PT-141 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.
| Seller | Task | Client on the report | Report date | Result | Batch | |
|---|---|---|---|---|---|---|
| Peptology Labs | #233901 | Peptology Labs | 21 Sep 2026 | Endotoxin · 2.328 EU/vial | PT6847 | verify |
| Peptology Labs | #233900 | Peptology Labs | 18 Sep 2026 | PT-141 · 11.58 mg · 99.966% | PT6847 | verify |
| Peptology Labs | #233902 | Peptology Labs | 18 Sep 2026 | As · not detected Cd · not detected Pb · not detected | PT6847 | verify |
| Camo Chem | #229227 | Camo Chem UK | 14 Sep 2026 | PT-141 · 11.13 mg · 99.710% | PT141-500EU-09-26 | verify |
| Camo Chem | #229228 | Camo Chem UK | 8 Sep 2026 | Endotoxin · 5.147 EU/vial | PT141-500EU-09-26 | verify |
| Pureline Biolabs | #209946 | Pureline Biolabs Ltd | 22 Jul 2026 | PT-141 · 9.65 mg · 99.874% | PLB-012 | verify |
| Imperialpeptides | #208632 | Imperial Peptides UK | www.imperialpeptides.co.uk | 20 Jul 2026 | PT-141 · 11.70 mg · 99.622% | PT10-06/28 | verify |
| Imperialpeptides | #208633 | Imperial Peptides UK | www.imperialpeptides.co.uk | 20 Jul 2026 | Endotoxin · <1 EU/vial | PT10-06/28 | verify |
| Imperialpeptides | #208634 | Imperial Peptides UK | www.imperialpeptides.co.uk | 20 Jul 2026 | As · not detected Cd · not detected Pb · not detected | PT10-06/28 | verify |
| Clinicore | #105655 | clinicore | 5 Feb 2026 | PT-141 · 11.86 mg · 99.864% | pt10101 | verify |
| Kensingtonlabs | #85945 | Kensingtonlabs.co.uk | 4 Nov 2025 | PT-141 · 10.70 mg · 99.783% | PT1-840MS | verify |
| Xlpeptides | #76135 | XL Peptides | 22 Aug 2025 | PT-141 · 11.59 mg · 99.939% | 901567 | verify |
What the 12 PT-141 certificates show
We have read 12 Janoshik reports covering PT-141, published by 7 UK sellers. Each was opened on Janoshik's own website. All 12 name the seller itself as the client. 9 of the 12 are dated within the last six months and 1 is more than a year old. The newest is dated 21 Sep 2026 and the oldest 22 Aug 2025.
7 of the reports give a purity figure for PT-141. The figures run from 99.622% to 99.966%, and all 7 are at 99% or above. 5 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: Peptology Labs: task #233900, analysed 18 Sep 2026, 11.58 mg recovered at 99.966%, client Peptology Labs; Camo Chem: task #229227, analysed 14 Sep 2026, 11.13 mg recovered at 99.710%, client Camo Chem UK; Pureline Biolabs: task #209946, sample received 22 Jul 2026, 9.65 mg recovered at 99.874%, client Pureline Biolabs Ltd.
A certificate is a batch document. The lines that matter are the compound (it must say PT-141, 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
Which UK sellers publish a verifiable Janoshik certificate naming PT-141?
As of 4 October 2026, 7: Peptology Labs, Camo Chem, Pureline Biolabs, Imperialpeptides, Clinicore, Kensingtonlabs, Xlpeptides. Each has a report on Janoshik's own website that names the seller as the client and lists PT-141. That is a statement about paperwork, not a recommendation; The Peptide Watch does not recommend anywhere to buy PT-141.
How recent is the newest PT-141 certificate from a UK seller?
The newest we have read is Janoshik task #233900, analysed 18 Sep 2026. It is published by Peptology Labs and names it as the client. A certificate covers one batch, so an old one says little about stock on sale today.
How do I check that a certificate for PT-141 is genuine?
Four things: an independent laboratory is named; the client field names the seller you are buying from, not a supplier; the compound line says PT-141; and the report's task number and key open the same report on the laboratory's own website (verify.janoshik.com). A branded PDF with no laboratory name and no verification code fails on the first check, however professional it looks. The free COA Checker on this site runs the checks for you.
Is PT-141 a licensed medicine in the UK?
Not licensed in the UK. Sold as a research chemical. FDA approved as Vyleesi on 21 June 2019; never submitted to the EMA. The Peptide Watch does not give legal or medical advice.
Why does The Peptide Watch not say where to buy PT-141?
Because the site records paperwork, not recommendations. A verifiable certificate proves that a sample of one batch was tested. It does not prove the vial you receive matches it, and it says nothing about whether anyone should use PT-141. Listing which sellers publish a certificate you can check, and which publish nothing, is as far as the evidence goes.
PT-141 in the UK at a glance
| Active UK sellers listing PT-141 | 16 |
|---|---|
| Of which publish a verifiable own-name certificate | 8 |
| Of which name no laboratory at all | 4 |
| Paying for Google Ads on it | 1 |
| Sellers of it that have closed or vanished | 0 |
Counted from the vendor ledger at build time: a seller is included when its audit records PT-141 in its certificates or its catalogue notes. Audit findings, not recommendations.
The other 8 sellers: what they publish instead
- No named lab, nothing to verify: 4
- Testing claimed, not yet evidenced: 2
- Anonymous / not its own: 1
- Real lab, but not Janoshik: 1
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 PT-141 in the UK
Advertising. Google's Ads Transparency Centre shows 1 of these sellers running ads: Kensingtonlabs. Paid reach is where a new buyer meets a brand before meeting any certificate.
Companies. 9 of the 16 can be matched to a Companies House record; the median company is 13 months old and 4 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. 7 of the 16 have a Trustpilot profile with a score; the median is 4.2, 3 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 PT-141 sellers
- 2026-09-28 Camo Chem (camochem.uk) added to the audit on the verified list.
- 2026-09-28 Clinicore (clinicore.co.uk) added to the audit on the verified list.
- 2026-09-28 PeptX (peptx.co.uk) added to the audit on the watch list.
- 2026-09-27 MrPep (mrpep.co.uk) added to the audit on the watch list.
- 2026-09-18 Wolverinepeptides (wolverinepeptides.co.uk) moved from verified to watch.
- 2026-09-16 Nugenyx (nugenyx.com) added to the audit on the watch list.
From the site changelog, which also runs as a JSON feed.
What the research shows for PT-141, and what it does not
| Papers on PubMed | 112 |
|---|---|
| Indexed as rat or mouse studies | 3 |
| Indexed as clinical trials | 16 |
| Published since 2020 | 59 |
| Trials registered on ClinicalTrials.gov | 10 |
An approved medicine in the United States. PT-141 is bremelanotide, Palatin Technologies' Vyleesi, approved by the FDA on 21 June 2019 for hypoactive sexual desire disorder in premenopausal women and now marketed by Cosette Pharmaceuticals. PubMed indexes 112 papers and 16 clinical-trial reports; ClinicalTrials.gov lists 10 registered trials.
Never submitted in Europe. No application has been made to the EMA, and it is not licensed in the UK.
What the licence covers. The trial evidence is for the licensed autoinjector in that indication; it is not evidence for men, for other uses, or for what is in a research-chemical vial, which only a certificate can say.
Who owns PT-141, and where it stands
| Originator | Palatin Technologies, as a metabolite of melanotan II. |
|---|---|
| Rights | Palatin Technologies; marketed as Vyleesi by Cosette Pharmaceuticals. |
| Development status | Approved in the US only. FDA approved as Vyleesi on 21 June 2019; never submitted to the EMA. |
| Clinical trials | 10 registered on ClinicalTrials.gov (lead sponsors: Palatin Technologies, Inc, AMAG Pharmaceuticals, Inc., Imperial College Healthcare NHS Trust) |
| In the UK | Not licensed in the UK. Sold as a research chemical. |
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.
Sources (9)
- Prespecified and Integrated Subgroup Analyses from the RECONNECT Phase 3 Studies of Bremelanotide. (J Womens Health (Larchmt), 2022, PMID 35230162)
- Safety Profile of Bremelanotide Across the Clinical Development Program. (J Womens Health (Larchmt), 2022, PMID 35147466)
- The Patient Experience of Premenopausal Women Treated with Bremelanotide for Hypoactive Sexual Desire Disorder: RECONNECT Exit Study Results. (J Womens Health (Larchmt), 2021, PMID 33538638)
- Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder: Two Randomized Phase 3 Trials. (Obstet Gynecol, 2019, PMID 31599840)
- Bremelanotide. (book chapter, 2012, PMID 34436837)
- Hypoactive Sexual Desire Disorder in Women: Physiology, Assessment, Diagnosis, and Treatment. (J Midwifery Womens Health, 2021, PMID 34510696)
- Bremelanotide. (book chapter, 2006, PMID 31369224)
- Drugs.com, Vyleesi FDA approval history
- Palatin Technologies, FDA approves Vyleesi
The Peptide Watch's position on PT-141
Not licensed in the UK. Sold as a research chemical. The Peptide Watch reads the certificates UK sellers publish and does not recommend anywhere to buy PT-141. Sellers on this page are listed by the date of their newest PT-141 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.
An honest note: a verifiable certificate proves a sample of a batch was tested, not that the specific vial you receive matches it, see what this can and can't tell you. The Peptide Watch sells no PT-141 and links to no shop; this is research-use-only information, not medical or dosing advice.
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