Melanotan II is the product that's been dubbed the "Barbie drug" on social media, and promises to give users a tan without the sun but it can have serious side effects including, in rare cases, 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 longer lasting than Eruptive Dysplastic Nevi Following Melanotan Use Actas Dermo Sifiliogrficas Self confessed tanning addict Hannah has been using illegal tanning injections for three years and has no plans to stop Fresh warning for 'Barbie drug' Medical Republic