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 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 II (Tan Jabs): Why They're Not Worth The Risk Melanotan What It Is and Its Relation to Skin Cancer Melanotan medAge Aesthetics & Wellness Don't risk using tanning products containing melanotan Therapeutic Goods Administration (TGA)