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 Figure 3 from The efficacy of afamelanotide and narrowband UV B phototherapy for repigmentation of vitiligo. Semantic Scholar How Long Does It Take For Melanotan To Work? What are 'melanotan' injections? Explaining the controversial tanning drug Dazed How Keratopigmentation Permanently Changes Your Eye Color Allure 50 Weeks on Melanotan2. Used to be Type 1 and never able to tan. Have never felt better! Beard color change is epic : r Melanotan2