The whitening effect of vitamin C is to resist oxidation and promote the decomposition of peroxide, which is a substance that causes skin aging. However, it is enough to consume Vc in vegetables and fruits every day, and too much Vc can not play a purposeful whitening role. Moreover, taking a lot of Vc will reduce the normal intake of Vc, but it will lead to VC deficiency and slow recovery. I suggest that you don't blindly use Vc as a whitening product.