Clinically important side effects of Melanotan II and placebo Download Table Melanotan II (MT II) Peptide Therapy Beverly Hills Melanotan II Erectile Dysfunction: What the Evidence Shows and Practical Considerations 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 A Current Affair: Tanning 'Barbie drug' a danger to users, experts say