2. The effect of eating VE is better than coating it on the face, because VE is easy to oxidize and lose its function in the air.
3. Pay attention to sun protection after using skin care products containing VC, otherwise it is easy to grow dark spots. So it is generally recommended to use it at night. In addition, too high concentration of VC is very irritating to the skin, so we should pay great attention to direct use, which is also the reason why people with sensitive skin are allergic to whitening products.
4. The VE of Yangshengtang is better, with smaller molecules and easy absorption.
5. VC levorotatory C used in skin care products is better, and only levorotatory C can be directly absorbed by the skin.