Melanotan 1 (10 MG) Sigma Compounds Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and longer lasting than Melanotan 2 more than just a tanning effect This research peptide mimics natural biological processes and specifically stimulates melanin production, supporting the development of an even bronze tone without MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent. Melanotan II (Tan Jabs): Why They're Not Worth The Risk