You Should Avoid Using Nasal Tanning Sprays Nasal tanning sprays linked to cancer sold online what are they and are they legal? ITV News 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 Reacting to TikTok Melanotan Nasal Spray Challenge