Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan is not a tan. It's an unregulated peptide with real risk. As a dermatologist, here's the reality: It has been linked to new and changing moles including cases of Dangerous' tanning products promoted by influencers Say NO to tanning injections and nasal sprays. They are illegal in the UK and have serious, harmful side effects BBC News Latest News Picks, Toxic tanning "I didn't think I'd get skin cancer"