MT2 Libido: What Melanotan II Users Experience and What Science Actually Shows 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 Nortech Labs Melanotan II PDF) Changes of melanocytic lesions induced by Melanotan injections and sun bed use in a teenage patient with FAMMM syndrome