PT-141 (bremelanotide) is a synthetic cyclic heptapeptide analogue of alpha-melanocyte-stimulating hormone, supplied as a lyophilised powder. It is supplied strictly for laboratory research use only.

What research area is PT-141 associated with?

Published preclinical laboratory work in this class concerns central melanocortin receptor binding chemistry. We supply the material only; we make no representation as to any outcome, effect, or suitability for any purpose.

Is PT-141 approved for human use?

No. PT-141 is not a drug, supplement, food, cosmetic, or medical device, and has no approved human or veterinary indication. It is sold strictly for in-vitro laboratory research use by qualified professionals.

What purity is PT-141 supplied at, and how is it verified?

Each lot is assayed by HPLC and ships with its own lot-specific Certificate of Analysis, published in our COA registry. Purity figures are stated per lot - we do not publish a brand-wide specification in place of the actual certificate.

PT-141

Cyclic heptapeptide melanocortin analogue, supplied for laboratory research use only.

99.95% pure on this exact lot, verified by an independent lab, not by us
Tested in the USA. Ships within 1 business day, stored frozen, stable at room temperature until you mix it
Retest it at any lab. If it doesn't match our report, every dollar back

$59/ 10mg vial

$29.50 per vial with Buy 1, Get 1 Free

Buy 1, Get 1 Free· add 2, applied automatically

99.95% pure on this exact lot, verified by an independent lab, not by us
Tested in the USA. Ships within 1 business day, stored frozen, stable at room temperature until you mix it
Retest it at any lab. If it doesn't match our report, every dollar back

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All products currently listed on this site are for research purposes only.

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Proof, not promises. Every batch, tested by an outside lab.

Every batch of PT-141 is tested by an outside lab before it goes on sale — not by us. The one shipping now is lot D85YB7: 99.95% pure by HPLC, tested by Freedom Diagnostics on 08 Oct 2026. The signed report is right here. Purity is the number the lab measured, never “at least 99” — and a batch that misses its spec never ships.

PT-141 · 10mgLot D85YB7Live batch data

Purity99.95%

Passed

Tested by: Freedom Diagnostics
Tested on: 08 Oct 2026
Net content: 8.04 mg

Contaminant screens

Heavy metalsEndotoxinsMicrobialSolvents

See all lab reports

What happens before a vial reaches you

1Made in a controlled facilityDocumented, repeatable steps for every batch.
2Purity testedAn outside lab measures it and reports the exact number.
3Identity confirmedA second test proves it is what the label says.
4Report publishedSigned, filed by lot number, and public before the vial ships.

Live batch data

Freedom Diagnostics

Independent analytical lab

Certificate of Analysis

RESULT · PASS

Lot D85YB7Verified

PT-141 10mg

HPLC purity

99.95%

Pass · Meets spec

Tested

08 Oct 2026

HPLC-UV + LC-MS

Analytical results

Identity (LC-MS)ConfirmedPASS

Net content8.04 mgPASS

HPLC Chromatogram

Main peak 99.95% · other 0.05%

Alex JohnsonPrincipal Chemist

Authentichain · Verified 8×

MC4Rcentral arousal

Non-vascularvs PDE5

Sexual responsemale & female

How PT-141 works

A melanocortin research peptide studied for driving arousal through the brain, not blood flow.

MC4Rcentral arousal

Studied for triggering arousal through MC4R brain signalling rather than the vascular route.

Non-vascularvs PDE5

Investigated for working through a pathway that still responds when blood-flow drugs do not.

Sexual responsemale & female

Researched across both male and female sexual-response models.

For research use only. Mechanisms described reflect published research literature.

Every batch we've tested

Anyone can show you one good report. Here is every batch of PT-141 we have ever released, newest first, each with its own signed report. Nothing hidden, nothing cherry-picked.

6 batches on record · latest tested 08 Oct 2026

All lab reportsEvery PT-141 batch, on one page.The full testing history with every signed report. No login, no email wall.See all lab reports

What the studies found

Published findings on this compound, each linked to its source. Animal and lab results are context, not claims about this product.

Arousal in womenClinical

In a placebo-controlled study of premenopausal women with sexual arousal disorder, bremelanotide (PT-141) increased subjective sexual response compared with placebo.

vs placebo

J Sexual Medicine 2006 · double-blind, placebo-controlled

Placebobaseline response

PT-141higher arousal

Directional finding — relative heights, not exact magnitudes.

Erectile responseClinical

In men with mild-to-moderate erectile dysfunction, intranasal PT-141 produced measurable pharmacodynamic effects on erectile response versus placebo.

vs placebo · intranasal

Placebobaseline

PT-141improved response

Directional pharmacodynamic finding — relative heights.

Int J Impotence Research 2004 · double-blind, placebo-controlled

How it worksPreclinical

Mechanistic research suggests PT-141 acts on melanocortin receptors in the brain to drive arousal — a central pathway separate from the blood-flow (PDE5) route used by drugs like sildenafil.

Central melanocortin (brain)MC pathwayVascular / PDE5not involved

Acts independent of nitric oxide / PDE5 vascular signaling.

Ann NY Acad Sci 2003 · mechanistic review

Full research: PT-141 (Bremelanotide): What the Research Actually Shows