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 A Sun Kissed Look, and a Confident You. Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian Melanotan II Wikipedia FDA Fast Facts No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky