I also looked up a lot on the internet in this respect. Vitamin C is an antioxidant, and vitamin E can reduce pigmentation. But pay attention to buy natural, not synthetic. It is not good to eat too many other synthetic ingredients. Generally, they are from Yangshengtang and Amway. If you are young, don't add too much. You can eat fruits with more vitamins C and E, which is also very safe. Of course, this is just my personal opinion.