Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Emerging Threat: Melanotan, Repackaging, and Online Sales 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 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 Tanning peptides like melanotan are trending online, but theyre not approved, not regulated, and illegal to advertise in Australia. When products havent been properly tested, theres no way to know Melanotan What It Is and Its Relation to Skin Cancer