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 Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas Stop Taking Melanotan II Dermatologist Breaks It Down Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn The Tanning Drug What Patients Should Know How to Mix Melanotan 2 Injections Easy Instructions