Melanotan 2 Nasal Spray Polar Peptides 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 1 75921 69 6 FM39599 Biosynth Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan 2 Reviews, Clinical Trials, and Safety