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); 8 verified sellers hold one covering PT-141, listed newest first below.
Who holds the newest PT-141 report (8 verified UK sellers)
| Seller | Newest PT-141 report | Age of that report | |
|---|---|---|---|
| Peptology Labs peptologylabs.uk | 18 Sep 2026 | 1 month, 2 days | verify |
| Mercia Research merciaresearch.com | 18 Sep 2026 | 1 month, 2 days | verify |
| Camo Chem camochem.uk | 14 Sep 2026 | 1 month, 6 days | verify |
| Pureline Biolabs purelinebiolabs.co.uk | 22 Jul 2026 | 2 months, 28 days | verify |
| Imperialpeptides imperialpeptides.co.uk | 20 Jul 2026 | 3 months | verify |
| Clinicore clinicore.co.uk | 5 Feb 2026 | 8 months, 15 days | verify |
| Kensingtonlabs kensingtonlabs.co.uk | 4 Nov 2025 | 11 months, 16 days | verify |
| Xlpeptides xlpeptides.com | 22 Aug 2025 | 13 months, 28 days | verify |
Newest report first. Every report was opened on Janoshik's own website and names the seller as the client. The date is the analysis date printed on the report. The verify link opens the laboratory, never the shop. Audit findings, not recommendations.
A record of paperwork, not a recommendation: The Peptide Watch sells nothing, takes no money from sellers and links to none of them.
Why the date matters · What purity means · What PT-141 is · Regulators · Every report
Every PT-141 purity report we have read (8), one row per report
The 8 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 | |
|---|---|---|---|---|---|---|
| Mercia Research | #231845 | Mercia Research Limited | 18 Sep 2026 | PT-141 · 10.50 mg/ml · 99.959% | MRL-26Q3-A13 | verify |
| Peptology Labs | #233900 | Peptology Labs | 18 Sep 2026 | PT-141 · 11.58 mg · 99.966% | PT6847 | verify |
| Camo Chem | #229227 | Camo Chem UK | 14 Sep 2026 | PT-141 · 11.13 mg · 99.710% | 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 |
| 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 |
Why the date on a certificate matters
What a purity figure means
The purity on a Janoshik report is the share of the main peak in an HPLC chromatogram. 99.5% means that 99.5% of what the detector saw was one substance and 0.5% was something else. It is not the amount in the vial: that is the separate quantity line, in milligrams. It does not by itself prove which substance the peak is: that is identity, confirmed by mass spectrometry. And it says nothing about sterility, endotoxins or heavy metals, which are separate tests.
A purity figure printed on a shop page with no report behind it is a claim, not a measurement. Between two reports, the difference that matters is rarely 99.2% against 99.8%; it is whether the report exists at all, names the seller as the client, covers this compound on its own, and is recent.
What PT-141 is, and what it is sold as
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.
| Development status | Approved in the US only. FDA approved as Vyleesi on 21 June 2019; never submitted to the EMA. |
|---|---|
| Originator | Palatin Technologies, as a metabolite of melanotan II. Rights: Palatin Technologies; marketed as Vyleesi by Cosette Pharmaceuticals. |
| Registered clinical trials | 10 on ClinicalTrials.gov |
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.
The published record in numbers, and the sources
| Papers on PubMed | 112 |
|---|---|
| Indexed as rat or mouse studies | 3 |
| Indexed as clinical trials | 16 |
| Published since 2020 | 59 |
Counts are from PubMed on 15 September 2026 using the queries recorded in our evidence file. A description of the published record, not medical advice and not an argument for or against use.
- 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
What regulators say about PT-141
In the UK. Not licensed in the UK. Sold as a research chemical.
We hold no statement from the FDA, MHRA or EMA specifically about PT-141 on file. Its development and licence sources are listed under the record above.
What the 8 PT-141 certificates show
We have read 8 Janoshik reports covering PT-141, published by 8 UK sellers. Each was opened on Janoshik's own website. All 8 name the seller itself as the client. 5 of the 8 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 22 Aug 2025.
All 8 reports give a purity figure for PT-141. The figures run from 99.622% to 99.966%, and all 8 are at 99% or above. A purity figure describes the sample the laboratory received, not every vial from that batch.
Read directly from the newest reports: Mercia Research: task #231845, analysed 18 Sep 2026, 10.50 mg/ml at 99.959%, client Mercia Research Limited; 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.
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.
PT-141 in the UK at a glance
| Active UK sellers listing PT-141 | 24 |
|---|---|
| Of which publish a verifiable own-name certificate | 9 |
| Of which name no laboratory at all | 4 |
Counted from the vendor ledger at build time. The A-Z directory lists every seller and what each publishes instead.
Questions people ask
Which UK sellers publish a verifiable Janoshik certificate naming PT-141?
As of 20 October 2026, 8: Peptology Labs, Mercia Research, 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.
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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