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 Fat loss can be triggered through the brain in animal model, researchers find UF Health Melanotan What It Is and Its Relation to Skin Cancer Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News 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 Changes in Oral Mucosa Associated with Melanotan II Injections: A Case Report