Vitamin c has a reducing effect and can whiten skin; Vitamin e can mainly protect the skin and make it delicate and smooth; Both of them can play a certain role in freckle removal. If it is common freckles, the role of vitamin C is better. If it is chloasma caused by age, the effect of vitamin E is better. The effect should be more obvious when they are used together, but it will take more than two months or even longer if they are used regularly for a long time. Moreover, vitamin E must be natural, and artificial ones are generally medicinal. Long-term use will have side effects, but if it is used externally on the face, you don't have to be so particular.