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 1 vs Melanotan 2: Are These Peptides Effective for Tanning? Discover Melanotan 1 vs 2 Differences Peptide Works Strong Oral Spray Melanotan AUS Melanotan What It Is and Its Relation to Skin Cancer 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 libido,