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 Nasal Tanners Say "NO WAY" to the spray! UNAPPROVED, UNREGULATED, UNSAFE. Nasal tanning sprays, or nasal tanners, promise an all over tan without sun exposure. However, they are unregulated, can be Doctors warn against tan injections Nasal tanning spray warning We've become aware of widespread availability of nasal sprays containing Melanotan II, mostly on line, but also through gyms and salons. The sprays are promoted as a safe way