Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn That quick tan injection is NOT worth the risk., Melanotan peptide injections stimulate pigment cells, and its use has been linked to rapid changes in moles, including the potentially fatal skin Melanotan II Peptide Elite Beauty Toledo Understanding Injection Tan and Melanotan 2 Rise in use of 'dangerous' tanning injection Channel 4 News