The Truth About Melanotan: Tanning Peptide or More? Melanotan Peptides Peptide Sciences Corp 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 Melanotan I vs II Which Tanning Peptide Is Safer and More Effective CDMO for Pharm & Bio Kilo Biotechnology Melanotan I 10 MG 99% Purity NuScience Peptides Peptides for tanning do exist. Melanotan 1 and Melanotan 2 both work at increasing melanin in the skin. Melanotan 1 takes longer to activate. Melnotan 1 is FDA approved. Melanotan 2 does