When it comes to the compatibility of vitamin C and glycolic acid, it is necessary to investigate its properties in detail. Vitamin C has strong reducing properties, can resist oxidation in the skin, help collagen production, and can brighten skin spots. Glycolic acid is a genus of fruit acid, which can loosen the adhesion between keratinocytes, exfoliate and promote skin renewal, making the skin smooth and delicate.

However, the combination of the two has something to worry about. Vitamin C is stable in an acidic environment, while glycolic acid is also acidic. The combination of the two may cause the pH value to be too low, the skin's tolerance is poor, and it is prone to irritation, such as redness, tingling, and itching. And the reduction of vitamin C is strong, and it is co-applied with glycolic acid, or a chemical reaction can cause the inactivation of vitamin C and reduce its skin care effect.

If you want to use it together, you should be careful. You can try it first on a small area of skin to see if there is any discomfort. And it is appropriate to use vitamin C at intervals, such as in the morning to prevent daytime oxidation, and in the evening to use glycolic acid to promote skin renewal. Or according to skin tolerance, reduce its concentration and gradually increase it, in order to keep the skin comfortable, do its best skin care ability, and avoid its harm.