Melanotan 1 (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 Melanotan Tanning Peptides: Safe Use, Side Effects & How It Works Scientifically Melanotan II (Tan Jabs): Why They're Not Worth The Risk Watch Me Tan with Melanotan 2 MT2 Year 2 Results, Side Effects, & My Full Protocol Melanotan Peptides Peptide Sciences Corp