Melanotan What It Is and Its Relation to Skin Cancer 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 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 You Should Avoid Using Nasal Tanning Sprays