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Melanotan-2 and PT-141 research peptide vials compared
Peptide Comparisons 7 min read 2026-06-23

Melanotan-2 vs PT-141: How the Two Melanocortin Compounds Differ

Last updated: 2026-06-23

Written by the AllMyPeptides Research Team

Melanotan-2 vs PT-141: At a Glance

PT-141 (bremelanotide) is structurally derived from Melanotan-2. Both are melanocortin-receptor agonists, but they are studied for different receptor emphases and have different regulatory standing.

Research use only. Both compounds are supplied for in-vitro laboratory research. Neither is a medicine, and neither is for human or veterinary consumption, administration, or therapeutic use.

How They Differ — Receptor Focus

Melanotan-2 is a broad melanocortin agonist studied in pigmentation contexts. PT-141 is studied with emphasis on the melanocortin-4 receptor (MC4R), a central-nervous-system target. The structural relationship is close, but the research focus differs.

Regulatory Status

Melanotan-2 is not approved and authorities have warned against unlicensed products sold for human use. PT-141, as bremelanotide (Vyleesi), is FDA-approved in the US for a specific indication under medical supervision, but is not licensed for general use in the UK. Research-grade material of either is supplied for laboratory use only.

Sourcing for Research

See our individual guides and our UK legality overview. View Melanotan-2 and PT-141 product details.

Frequently Asked Questions

What is the difference between Melanotan-2 and PT-141?+
PT-141 (bremelanotide) is derived from Melanotan-2 but is studied with emphasis on the MC4R receptor and has an approved medical form (Vyleesi) in the US; Melanotan-2 is a broader melanocortin agonist with no approval.
Is Melanotan-2 or PT-141 approved?+
PT-141 (as bremelanotide/Vyleesi) is FDA-approved in the US for a specific indication; Melanotan-2 is not approved anywhere. Neither is licensed for general UK use, and research-grade material is for laboratory use only.
Are they the same compound?+
No. They are structurally related but distinct molecules with different receptor emphasis and regulatory status.

Products discussed in this guide are for research and laboratory use only. AllMyPeptides does not condone or support misuse of any research materials. Not for human or animal consumption.