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 Figure 5 from Changes of melanocytic lesions inducedby Melanotan injections and sun bed use ina teenage patient with FAMMM syndrome Semantic Scholar Melanotan II Synthetic Tanning Drug Molecule #3 Art Print by Molekuul Science Photo Library Fine Art America Melanotan II reverses memory impairment induced by a short term HF diet ScienceDirect