Melanotan 1 vs. 2: My Summer Journey & Real Results Natural Kaos 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 PDF] Pseudoleucoderma after injections of afamelanotide in a patient with atopic dermatitis. Semantic Scholar 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