Experts are warning against the viral unregulated nasal tanning spray trend. #news @mayaeaglin 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 Doctors warn against viral nasal spray tanning trend Melanotan II Nasal Tanning Spray Risks: Dizziness, Nausea, Skin Cancer Business Insider Melanotan II (Tan Jabs): Why They're Not Worth The Risk