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 Brits buy 17 illegal 'Barbie' tanning injections that 'lead to kidney failure, brain swelling and hallucinations' This guy injected himself with a drug called Melatonan II for 5 months. Here's his before after. : r pics A deeply tan RFK Jr. is a picture of American health The Washington Post