Melanotan II: Natural Tanning, Hormone Balance & Vitality Boston Health Longevity Melanotan (MT) II Melanocortin Receptor TargetMol 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