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 Melanotan II: Tanning injections, nasal sprays harmful to health No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky SYNTHETIC MELANOTROPIC PEPTIDE INITIATES : Journal of Urology Sharing my personal experience with Melanotan tanning injections (now nasals) how vanity led me down the path of using it, thinking I'd done all my research. Now, years later, I'm dealing with