I want to know whether glycolic acid and niacinamide can be used in combination, which is a key question for skin care. Glycolic acid belongs to the class of fruit acids, which has the power of rejuvenation, can exfoliate, make the skin smooth and delicate, and can promote collagen production, making the skin firm and elastic. Niacinamide is a good skin care product, which can reduce pigmentation, even out skin tone, shrink pores, and strengthen skin barrier.

However, when the two are used in combination, caution is required. Glycolic acid is acidic, and niacinamide may change to niacin under a specific pH environment. Niacin is highly irritating to the skin, or cause redness, tingling and other discomforts. Therefore, if you want to use it in combination, you should first test the skin's tolerance. Apply a small amount of product to the back of the ear or a small piece of facial skin. When observing the number, if there is no abnormality, try it step by step.

When stacking, the order should also be paid attention to. It is usually advisable to apply nicotinamide first, and then apply glycolic acid after it is absorbed. This may reduce the risk of irritation caused by the interaction of the two. Also pay attention to the frequency of use. It should not be too frequent in the early stage. After the skin adapts, increase the number of times.

In short, when glycolic acid is used in combination with nicotinamide, if the method is appropriate, it may be able to obtain better skin care effect; if it is not careful, it may hurt the skin. Therefore, it is wise to understand in detail before use and follow your own skin type