Melanotan II (Tan Jabs): Why They're Not Worth The Risk Melanotan (MT) II Melanocortin Receptor TargetMol 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 II synthetic tanning drug mo Stock Image Science Source Images Melanotan II A Sun Kissed Look, and a Confident You.