Sexual Health & Hormone Research Peptides
Two compounds sit here, and one of them needs a warning before anything else. A licensed prescription medicine containing bremelanotide exists. What we sell is not that medicine, and the trials behind the approved product were not run on a research vial.
Both compounds carry a third-party certificate with the laboratory and the batch named. Neither is approved for human use in Canada, and we publish no dosing, no protocols and no stacks.
What's here, and what has been tested
| Compound | Identity | Purity | Laboratory | Batch |
|---|---|---|---|---|
| PT-141 | Bremelanotide, a melanocortin receptor agonist. CAS 189691-06-3, 1025.2 g/mol | 99.70% | Medutest | WWB-P41-9870 |
| Kisspeptin-10 | Decapeptide from the KISS1 protein. CAS 374675-21-5, 1302.4 g/mol | 99.46% | Medutest | WWB-KS10-4805 |
Both figures came from HPLC. An HPLC purity result covers identity and purity of the material in the tested lot. It does not measure sterility, endotoxin or heavy metals, and it describes that lot rather than everything sharing a label. We hold each report and send it on request.
PT-141's 99.70% is the second highest result across the seventeen compounds we've had assayed, behind BPC-157 at 99.781%.
The approved product problem, stated plainly
This is the most important thing on the page.
Bremelanotide is the active ingredient in a licensed prescription medicine approved in some markets. That medicine went through randomised Phase 3 trials.1 Those trials tested the licensed pharmaceutical product, made under pharmaceutical manufacturing conditions, prescribed and supervised. They did not test a research-grade vial bought online, and the two are not interchangeable.
Anyone citing those trials to describe a research compound is stretching the evidence well past what it'll support. We're naming the trials so you know they exist and so you know exactly what they were run on, not to borrow their conclusions.
It also puts this compound in a different regulatory position from the rest of the catalogue, and that's worth saying out loud. Where an approved product exists, selling an unapproved version of the same molecule attracts more scrutiny, not less.
What each compound actually is
PT-141, also written PT 141 and known as bremelanotide, is a melanocortin receptor agonist.2 That's a statement about which receptor class it binds, not about what happens afterwards in a person. It's structurally related to the melanocortin compounds in tanning research peptides, which is a chemical relationship rather than a functional one.
Kisspeptin-10 is a decapeptide, ten amino acids, derived from the larger KISS1 protein.3 A 2014 review in Human Reproduction Update covers the kisspeptin-GnRH pathway in human reproductive physiology.4 That review describes a signalling pathway. It isn't a finding about a vial, and we're not extending it into one.
Both compounds are studied because of the receptor systems they interact with. We won't tell you what they do in a person, because that isn't something we can support for research-grade material supplied this way.
Regulatory status in Canada
Health Canada regulates injectable peptides as drugs and has stated in writing that labelling one "for research use only" doesn't remove it from that regulation.5 Both compounds here are supplied for laboratory research use only, and neither is approved for human or veterinary use.
The bremelanotide point above makes this category the one where that distinction matters most. We'd rather put it in the second sentence of the page than in small print at the bottom.
Buying hormone peptides in Canada
Both ship as single lyophilised vials, anywhere in Canada, and both are in stock. Kisspeptin-10 comes in 5mg and 10mg. PT-141 is a single strength, and the strength shown on its product page is being verified against our own specification before we restate it here. Each is reconstituted with bacteriostatic water, which we stock separately.
Compare on price per milligram rather than price per vial. When you order, the batch reference travels on the packing slip, so the report we hold is the report for the vial you open.
Browse the full range, or contact us with a compound name to ask for a certificate before you buy.
Common questions
What are hormone peptides? A loose label for peptides that interact with hormone signalling systems. Here it means one melanocortin receptor agonist and one fragment of a reproductive signalling protein. It isn't a chemical class and it isn't a claim about effects.
Is PT-141 the same as the prescription medicine? No. Bremelanotide is the active ingredient in an approved medicine in some markets, and what we supply is research-grade material of the same molecule. Different manufacturing conditions, no prescription, no supervision, and no approval. The trials were run on the medicine, not on this.
Which of these has a certificate of analysis? Both. PT-141 at 99.70% and Kisspeptin-10 at 99.46%, each with Medutest, each with the batch named. We send the report on request.
What is Kisspeptin-10 a fragment of? The KISS1 protein. It's a decapeptide, ten amino acids, verifiable through PubChem.
Are they safe? No safety profile has been established for either compound as supplied here, and a purity assay isn't a safety assessment. An HPLC result covers identity and purity in one lot. It doesn't measure sterility, endotoxin or heavy metals.
Are they legal in Canada? Health Canada regulates injectable peptides as drugs, and research use labelling doesn't change that. Nothing here is approved for use in a person, we won't supply dosing, and buying a vial doesn't make its use lawful. That applies with extra force to a molecule that already exists as a prescription product.
How long does reconstituted material last? Much less time than sealed lyophilised powder. Reconstitution shortens the usable life considerably, which is why the vials ship as dry powder.
Sources
- Kingsberg SA, Clayton AH, Portman D, Williams LA, Krop J, Jordan R, Lucas J, Simon JA. "Bremelanotide for the Treatment of Hypoactive Sexual Desire Disorder: Two Randomized Phase 3 Trials." Obstetrics and Gynecology, 2019. doi:10.1097/aog.0000000000003500. https://pubmed.ncbi.nlm.nih.gov/31599840/
- PubChem Compound Summary, CID 9941379, Bremelanotide. Pharmacology: "Bremelanotide is a melanocortin receptor agonist." https://pubchem.ncbi.nlm.nih.gov/compound/9941379
- PubChem Compound Summary, CID 25240297, Kisspeptin-10. CAS 374675-21-5, formula C63H83N17O14. https://pubchem.ncbi.nlm.nih.gov/compound/25240297
- Skorupskaite K, George JT, Anderson RA. "The kisspeptin-GnRH pathway in human reproductive health and disease." Human Reproduction Update, 2014. doi:10.1093/humupd/dmu009. https://pubmed.ncbi.nlm.nih.gov/24615662/
- Health Canada. "Think twice before injecting peptides bought online: unauthorized products can seriously harm your health." Advisory, 9 April 2026: "This type of labelling does not make these products legal or exempt from regulatory requirements." https://recalls-rappels.canada.ca/en/alert-recall/think-twice-injecting-peptides-bought-online-unauthorized-products-can-seriously-harm
