Melanotan II Wikipedia Viral 'Barbie drug' for tanning can cause brain swelling and even cancer, experts warn Melanotan II reverses memory impairment induced by a short term HF diet ScienceDirect Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically 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