Emerging Threat: Melanotan, Repackaging, and Online Sales Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Tanning from the inside out = Highly Dangerous and Illegal! Many products advertised on social media platforms promising a tan from the inside out or a tan without sun such Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News Tanning, fake tan and Melanotan Cancer Research UK