Going too far to tan? 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 Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report Your Guide to Melanotan II: What to Know Before Beginning Your Peptide Therapy