Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Pigmented (Purple or Brown) Lesions in the Mouth Pigmented (Purple or Brown) Lesions in the Mouth Kazemi Oral Surgery Facialart.com Melanotic macule MEDizzy Pyoderma Gangrenosum Secondary to Melanotan Cureus You Should Avoid Using Nasal Tanning Sprays