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 Tanning Bed & Nasal Spray User Warned Of Dangers: 'You'll Regret That' Australians who use tanning products containing 'melanotan' are at risk of serious health problems. These products include nasal sprays and other injectable and ingestible tanning products, and are being illegally promoted and MT II or tanning beds??? #health #wellness #peptide #tanning #science Viral tanning 'Barbie drug' linked to cancer, experts warn Nasal Spray Tans: The Warning You Didn't Want To Hear