On the use of glycolic acid and retinol
The nourishment of the skin is related to the beauty of the face. Glycolic acid and retinol are both good materials in the field of skin care, but they are used wisely to achieve good results.

Glycolic acid belongs to the group of fruit acids and has the ability to exfoliate. Its molecules are slender and can penetrate the surface of the skin. The bond between instant keratin makes the old waste keratin dissociate and fall off, rejuvenate the skin, make the face look like clotting and shiny. And it can promote the synthesis of collagen and hyaluronic acid in the dermis, fill the skin, reduce wrinkles and resist aging. However, it is strong in nature. For beginners, it is recommended to start with a low concentration, such as 2% - 5% glycolic acid products, once to twice a week. After cleansing at night, apply thinly to the face to avoid the eye area and lips. If the skin can tolerate it, gradually increase the frequency and concentration. Be careful to prevent sun exposure when using it, because it increases the skin's sensitivity to ultraviolet rays.

Retinol is a vitamin A derivative, which can regulate cell growth and differentiation, promote epidermal cell renewal, smooth wrinkles, refine pores, and also help melanin metabolism and smooth skin tone. But retinol is also irritating, and tolerance is built at the beginning of use. It is recommended to use the product with a concentration of 0.025% - 0.05%, once every three days, thinly apply it before going to bed in the evening, and then adjust the frequency and dosage according to the skin reaction.

As for the use of the two, it is especially prudent. Glycolic acid makes the stratum corneum thin, and retinol is irritating. When used in combination, the skin may be unbearable, causing redness, swelling, desquamation, and tingling. Therefore, if you want to combine the two, you should build your own tolerance first. When the skin adapts, you can first use glycolic acid, at an interval of more than half an hour, and then use retinol, and start from a low frequency to closely monitor the skin reaction. In case of discomfort, stop

In general, although glycolic acid and retinol are good skin care agents, they must be skin-oriented and follow the method gradually to ensure skin health and radiance.