MT 2 Melanotan II 10 mg Melanotan 2 Dosage Calculator and Chart A Z Guide No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky 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 Warning issued over increased use of 'Barbie drug'