Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Emerging Threat: Melanotan, Repackaging, and Online Sales 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 How Long Does PT 141 Last? Duration and Timing Guide Inner Balance