Melanotan II Peptide: Tanning, Immunity, and Metabolic Support Revolution Health & Wellness Melanotan 1 (10 MG) Sigma Compounds 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 Figure 5 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar Activation of the central melanocortin system in rats persistently reduces body and fat mass independently of caloric reduction