Melanotan II Erectile Dysfunction Studies: What Early Research Shows and Practical Realities Melanotan: A tanning peptide that stimulates melanin production. Used for UV protection and even skin tone, it may offer benefits like reduced sun damage risk and appetite suppression, helping patients achieve a Avoid nasal tanning sprays or nasal tanners entirely. These products can produce nasty side effects, such as nausea and vomiting, high blood pressure, respiratory issues, and even links to skin cancer. Nasal Melanotan II for Erectile Dysfunction: What the Evidence Shows and Practical Considerations