Can You Use Melanotan Long Term? Melanotan II Wikipedia Dangerous' tanning products promoted by influencers BBC News Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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 PDF) Melanotan Tanning Injection: A Rare Cause of Priapism