Here's the part nobody explains when they're selling you the "Barbie drug." Melanotan 2 is a synthetic peptide that mimics alpha MSH a hormone your body already makes to tell your skin The weight loss drug Melanotan 2, also known as the Barbie drug, has taken social media by storm. Melanotan 2 is widely promoted online, despite it being illegal and dangerous in the UK. Amber Haque Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas Achete illgalement, la "Barbie drug" lui provoque une rection douloureuse de 22 heures