Harmless, VC can protect VE from oxidation. If taken orally, it is a good vitamin for the skin. VE moistens the skin, and VC promotes the growth of skin mucosa, and can also prevent colds and oral ulcers.

VE can whiten and remove spots by piercing the coating before going to bed. But it depends on the ingredient list. Nothing on the ingredients list except VE and vegetable oil can be used for external use. I know it can be used externally. Tianjin Central Medicine Company is cheap, while Yangshengtang and Amway are expensive.

VC is very acidic, and a large number of long-term external use will hurt the skin, but it is still possible to add VC solution to skin care products, which has the effect of whitening and promoting skin growth.