Melanotan II (MT II) Peptide Therapy Beverly Hills Melanotan II Peptide: Tanning, Immunity, and Metabolic Support Revolution Health & Wellness MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent. 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