Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations In the 1990s, researchers at the University of Arizona were testing Melanotan II as a tanning agent. During clinical trials, they noticed something unexpected: the compound was causing spontaneous erections in male A Current Affair: Tanning 'Barbie drug' a danger to users, experts say Tanning News, Research and Analysis The Conversation page 1 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