My roommate left pigmentation because of allergies. There is one method that I think is the most effective. First of all, take vitamins C and E, which is the best for the health care center. Second, soak paper film with snow muscle essence every day to get vitamins. If you use snow muscle essence, you should take it twice a week at most, so it won't last more than two months at most. My friend only used it for a month, and my skin is whiter than before! ! ! Talk from experience! ! ! !