Emerging Threat: Melanotan, Repackaging, and Online Sales Melanotan 2 Injectable Peptide MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent. Melanotan II 10mg Pura Peptides 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 Melanotan II Skin Pigmentation & Libido