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 What is Melanotan II the drug that the TGA urges consumers to avoid? Melanotan II Synthetic Tanning Drug Molecule #3 Canvas Print Activation of the central melanocortin system in rats persistently reduces body and fat mass independently of caloric reduction Melanotan II Peptide: Tanning, Immunity, and Metabolic Support Revolution Health & Wellness Doctors warn against tan injections