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 Alpha melanocyte stimulating hormone ( MSH): biology, clinical relevance and implication in melanoma Journal of Translational Medicine Springer Nature Link Melanotan What It Is and Its Relation to Skin Cancer Dark Spot Serum for Radiance Vinoperfect Caudalie