How Long Does It Take For Melanotan To Work? 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 Melanotan 2: Day 6 , Another one hour in what minimal sun we had today. , No tanning beds, just sun. , Moved down to 50mcg before sun exposure, No more side effects :) , Before & before , Well see Afamelanotide tested as a new treatment for vitiligo Vitiligo Clinic