MT 2 (Melanotan II) Polar Peptides 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 Unlocking the science behind skin pigmentation Melanotan is a peptide studied for its interaction with melanin pathways the biological systems responsible for skin tone and UV response. From pigmentation signaling Melanotan Tanning Injections The Low Down Lynton Lasers