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 as injectable Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Peptides are having a moment, but not all of them are harmless. One that's getting a lot of attention right now? Melanotan II. It's being used to achieve a tan from the A Current Affair: Tanning 'Barbie drug' a danger to users, experts say