Before and after Melanotan tanning therapy, sunless tanning results 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 October 2017 VOL. 14, ED 3. by PeningtonInstitute Issuu