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 Hypopigmented burn hypertrophic scar contains melanocytes that can be signaled to re pigment by synthetic alpha melanocyte stimulating hormone in vitro PLOS One Melanotan 2 results what results to expect MT 2 (Melanotan II) Polar Peptides