What Is Melanotan, the So Called Barbie Peptide? PS Beauty 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 Been testing out MT 1 peptide (Melanotan I) lately and honestly this stuff works. Originally developed for skin protection and UV resistance, but most people know it now for boosting melanin and giving MELANOTAN II PEPTIDE 10MG VIAL UMBRELLA Labs Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Melanotan II A Sun Kissed Look, and a Confident You.