Fuglycol acid serum, the frequency of weekly use, is related to the nature of the skin and cannot be generalized.

If the skin is healthy and well tolerated, it can be used twice a week when it is first used. This serum has the ability to rejuvenate the skin. When used in moderation, it can help the skin metabolize and make the skin glow. After a few days, if the skin adapts well, it can be gradually increased to three times a week.

For those with delicate or sensitive skin, it is recommended to start only once a week. Because glycol acid is irritating to a certain extent, delicate skin needs to adapt slowly. After each use, carefully observe the state of the skin. If there is any discomfort, such as redness, tingling, etc., suspend use. After the skin is soothed, reduce the frequency or concentration of use.

In short, if you want to get the best effect and keep the skin healthy, it is the best policy to carefully determine the frequency of weekly use of glycolic acid serum according to your own skin characteristics.