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 1 10mg Research Peptide Australian Peptide Store Clinically important side effects of Melanotan II and placebo Download Table Maintaining Tan with Melanotan 1: Dosage, Results, and Differences from Melanotan 2