Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report 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 Nutrishop Real Support. Real Results. 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