Here's the part nobody explains when they're selling you the "Barbie drug.", Melanotan 2 is a synthetic peptide that mimics alpha MSH a hormone your body already makes to tell your skin cells to The Dangers of Melanot*n II Explained 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 No, you don't need the 'Barbie drug' to tan, whatever TikTok says. Here's why melanotan II is so risky Yahoo News Australia