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 Melanotan & Tanning Injections: Safe or Risky? Melanotan 2 II Peptide Review Tanning Injection Results [STAY TAN YEAR ROUND!]