You Should Avoid Using Nasal Tanning Sprays 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 Melanotan II (MT II) Peptide Therapy Beverly Hills Can You Use Melanotan Long Term? The Dark Side of Melanotan Tanning Injections: My Personal Experience Revealed Nasal tanning sprays linked to skin cancer, trading standards officers warn Consumer affairs The Guardian