What To Expect During Your Melanotan Peptide Treatment And How It Works Age Well ATL Melanotan 2 (10 MG) Sigma Compounds 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 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 Top 3 ways to use the melanotan II peptide. #peptide #tanning