Melanotan 2 is a cyclic Ξ±-MSH analog with a shortened sequence (7 amino acids vs 13 in MT1) and a substantially broader receptor-binding profile. Unlike MT1, MT2 activates not only melanocyte MC1R but also MC3R and MC4R in the central nervous systemβcentral effects run through MC4R. Hypothalamic MC4R regulates appetite and energy balance; in spinal cord and limbic structures it drives sexual arousal via neural circuits that trigger erection in men and vaginal blood flow in women. MT2 is therefore simultaneously a tanning agent, appetite suppressant, and pro-erectile compound through one receptor family.
Pigmentation with MT2 develops faster and more strongly: MC1R activation drives eumelanin synthesis, and skin darkening can appear even without UV. In volunteer studies, subcutaneous dosing produced a durable tan in 1β2 weeks that persisted long after stopping. Most men also reported spontaneous erections and heightened libidoβeffects strong enough that this component was isolated and refined into PT-141 (bremelanotide) without melanogenic activity.
The broad receptor profile is both MT2βs main advantage and its key risk. MC4R activation in hypothalamic nuclei controlling cardiovascular function causes transient blood pressure rise and tachycardia in the first hours. Nausea is among the most common adverse effects, especially on first doses and above threshold. Long-term influence on melanocytic nevi remains open and warrants caution in people with many moles or family melanoma history.
π Melanogenesis and tan (MC1R): β
β
β
β
β
β€οΈ Sexual arousal and libido (MC4R): β
β
β
β
β
βοΈ Appetite suppression (hypothalamus): β
β
β
ββ
β
Safety: β
β
β
ββ (broad receptor profile requires careful dosing)
β οΈ Possible sensations and side effects: nausea, spontaneous erection, elevated BP, flushing; caution with atypical nevi
π€ Combinations (goal β stack)
π Tan + photoprotection β MT2 + MT1
β€οΈ Libido + central pathway β MT2 + PT-141
βοΈ Weight + appetite β MT2 + Cagrilintide
| CAS number | 121062-08-6 |
| Batch purity | 99.81 % |
Full details in our guide
https://peptideboost.club/guide/mt2
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