Unsafe 'Barbie drug' being promoted on social media Galway Daily 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 Emerging Threat: Melanotan, Repackaging, and Online Sales Melanotan II Synthetic Tanning Drug Molecule #3 Canvas Print Dangerous' tanning products promoted by influencers BBC News