On the consideration of the use of glycolic acid and vitamin C in the order of skin maintenance
, glycolic acid and vitamin C are both commonly used things. However, the use of the two in sequence is related to the profit and loss of efficacy, which cannot be ignored.

Glycolic acid has the ability to exfoliate, which can make the old and waste keratin on the surface of the skin fall off, making the skin new and radiant. Vitamin C is known for its antioxidant name, which can resist the damage of free radicals to the skin, whiten the skin, and promote collagen synthesis.

If glycolic acid is applied first, the stratum corneum becomes thinner and the skin's permeability increases. At this time, after the use of vitamin C, it is easier to penetrate into the deep layers of the skin and exert antioxidant effects, which complement However, if the skin is sensitive, glycolic acid will cause the stratum corneum to be too thin, and vitamin C may irritate the skin and cause discomfort.

On the contrary, if you apply vitamin C first, you can build an antioxidant defense line for the skin first. During the subsequent action of glycolic acid, although exfoliation, it is also protective. However, glycolic acid may affect the stability of vitamin C, resulting in a slight reduction in its efficacy.

Therefore, glycolic acid and vitamin C should be used in sequence, depending on the skin condition. Those with healthy and tolerant skin can first glycolic acid and then vitamin C, for high efficiency. For those with sensitive and fragile skin, it is recommended to use vitamin C as a base first, and then glycolic acid to ensure safety and gradually nourish the skin.