Sexual health / melanocortin
Melanotan II
Research chemicalMT-2 · Non-selective melanocortin agonist
Unapproved tanning/libido peptide with notable safety risks.
What it is
A synthetic cyclic alpha-MSH analog that stimulates both pigmentation and sexual arousal; widely sold online but not approved anywhere.
How it works
Non-selectively activates MC1R (tanning), MC3R/MC4R (appetite suppression and sexual arousal).
Studied for
Tanning, libido/erectile function, appetite (all unapproved/anecdotal).
Regulatory status
Not approved anywhere; warned against by regulators.
Safety
Darkening/enlarging moles with melanoma case reports, priapism, nausea/flushing; unregulated contamination risk — requires dermatologic caution.
Educational information only — not medical advice, and not a recommendation to use any compound. Many peptides here are not approved for human use; legal status and evidence quality vary and are noted above. This page contains no dosing information. Consult a qualified clinician before making any health decision.