Teen Boys and Young Men Are Injecting Peptides in Search of Perfection WSJ Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas 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 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 Melanotan (MT) II Melanocortin Receptor Agonist MedChemExpress