Melanotan II an overview ScienceDirect Topics 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, Melanotan Peptide Guide: Medspa Patient Information Leaflet (canva Template) Etsy Discover Melanotan 1 vs 2 Differences Peptide Works 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