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 Melanotan II: Tanning, Sexual Health Benefits, & Safety Concerns Pyoderma Gangrenosum Secondary to Melanotan Cureus What is the 'Barbie drug' and should authorities be worried? ABC News Imagine just wanting to be jacked and tan and you end up like this? Melanotan II is a peptide that increases the melanin in your skin and can give men a boner that Reacting to TikTok Melanotan Nasal Spray Challenge