Fresh warning for 'Barbie drug' Medical Republic 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 Melanotan II Research Peptide Australia Peptide Queens Health warning over banned tanning drug The Canberra Times Canberra, ACT Melanotan: Dangerous 'Barbie drug' nasal spray TikTok trend prompts new TGA warning Exclusive No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky