Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically PDF) Increasing illegal use of Melanotan: The Barbie drug hype Background 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 Peptides Peptide Sciences Corp Melanotan 1 MC1R Selective Peptide for Melanocortin Research