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 TikTok influencers slammed for promoting melanotan as a nasal tanning product The Canberra Times Canberra, ACT Experts are warning against the viral unregulated nasal tanning spray trend. #news @mayaeaglin Is Melanotan II (Afamelanotide) nasal spray safe to use for tanning? You Should Avoid Using Nasal Tanning Sprays