What are the mechanism of action and side effects of Melanotan 2 (afamelanotide)? Reacting to TikTok Melanotan Nasal Spray Challenge Seven Days Of Melanotan 2 , Only about 4 hours of sun exposure this week. , I feel as though my face has gotten the best results so far. , Hoping the sun actually comes out this week! , Have my IMB issues warning over tanning injections at salons or bought on internet The Irish Times Your body already makes a hormone that tells your skin to tan. Melanotan 2 is a synthetic peptide engineered to mimic that hormone but in a version that's more potent and longer lasting than