Whitening can be improved by supplementing vitamin C. Vitamin C, which can participate in a variety of redox reactions in the body, has a certain antioxidant effect, can accelerate the metabolism, thereby inhibiting the formation of melanin, reduce the accumulation of pigment, there is a certain whitening effect. For some chloasma caused by the skin yellowish, dull, can be appropriate supplementation of vitamin C. Vitamin C by affecting the activity of tyrosinase, can reduce the skin dull, so as to achieve the role of whitening and light spots. Vitamin C also has an antioxidant effect, which can prevent oxidative damage and effectively reduce the formation of melanin, thus achieving the effect of whitening and lightening, and can brighten the skin texture. It is recommended to use vitamin C under the guidance of a dermatologist.