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 Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Ready for summer without the damage Melanotan 2 supports a deeper, longer lasting tan with less UV exposure helping you achieve that natural glow faster and more evenly. No more burning. Melanotan II Peptide: Tanning, Immunity, and Metabolic Support Revolution Health & Wellness No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky