Stop Taking Melanotan II Dermatologist Breaks It Down 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 Melanotan II Results (With Before And After Pictures) The Tanning Drug Eruptive naevi and darkening of preexisting naevi 24 h after a single mono dose injection of melanotan II Semantic Scholar Melanotan II in Santa Barbara, CA Eternity Health Partners