MT 2 (Melanotan II) Polar Peptides Melanotan II Safety: Tanning Injection LIVV Natural 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 There are two peptides people talk about for tanning: Melanotan 1 and Melanotan 2. Melanotan 1 works slower and mainly targets the skin, leading to a more gradual and even increase in pigment with