Labial Melanotic Macules 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 Oral pigmented lesions: a pragmatic approach to diagnosis and management Faculty Dental Journal 05 May 03 Eng 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 Intramucosal melanocytic nevi CCIDE Dove Medical Press