Melanotan II Safety: Tanning Injection LIVV Natural Understanding Injection Tan and Melanotan 2 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 No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky What are the recent findings on the safety and efficacy of melanotan for therapeutic and cosmetic use?