Melanotan II Nasal Tanning Spray Risks: Dizziness, Nausea, Skin Cancer Business Insider 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 Experts are warning against the viral unregulated nasal tanning spray trend. #news @mayaeaglin The Tanning Drug What Patients Should Know You Should Avoid Using Nasal Tanning Sprays