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 What are 'melanotan' injections? Explaining the controversial tanning drug Dazed Melanotan What It Is and Its Relation to Skin Cancer Melanotan II Safety: Tanning Injection LIVV Natural MD breaking down Melanotan II Part 2 of my peptide series. The research, the risks, the reality. Long term safety data? Nonexistent.