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 Melanotan 2 (MT 2) 10mg Peptide Bank Melanotan 1 vs. 2: My Summer Journey & Real Results Natural Kaos Melanotan 2 Side Effects HubPages Melanotan 1 and Melanotan 2 are peptides that boost melanin to darken your skin without the sun. Melanotan 1 is FDA approved for rare light sensitivity conditions and gives a more gradual and even tan