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 What It Is and Its Relation to Skin Cancer Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report Targeting the central melanocortin system for the treatment of metabolic disorders Nature Reviews Endocrinology Tanning peptides like melanotan are trending online, but theyre not approved, not regulated, and illegal to advertise in Australia. When products havent been properly tested, theres no way to know