Tested: 2000 Toyota Celica GT S Aims at Y2K Youth Melanotan II 121062 08 6 FA109114 Biosynth 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 is the product that's been dubbed the "Barbie drug" on social media, and promises to give users a tan without the sun but it can have serious side effects including, in rare cases,