Melanotan peptide might seem like the cool thing to doit makes you look tan., But these unregulated injections come with real risks., They can cause unpredictable skin changes, including darkening of Insights into Tanning Biology and Tanning Products JCAD The Journal of Clinical and Aesthetic Dermatology Melanotan Tanning Injections The Low Down Lynton Lasers Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Dangerous 'Barbie drug' Melanotan II sparks crackdown on social media influencers ABC News