On the compatibility of glycolic acid Contraindications
Glycolic acid has different properties, and there are many contraindications in the compatibility of skin care products. This article details the reasons why it cannot be used with retinol.

Glycolic acid is active and has unique chemical properties. Retinol is also a common ingredient in skin care, but when the two meet, it is like water and fire, prone to changes. The acidic environment of glycolic acid can make the chemical structure of retinol unstable. Retinol can maintain its activity and efficacy in a specific acid-base range. The intervention of glycolic acid causes acid-base imbalance, which gradually changes the structure of retinol, and its original skin care power is greatly reduced.

And the use of both may increase the risk of skin discomfort. Glycolic acid is naturally irritating. Although it can rejuvenate the skin, excessive stimulation can easily cause skin sensitivity. Retinol also irritates the skin to a certain extent. When the two are superimposed, the skin seems to bear double pressure, and redness, swelling, tingling, itching and other diseases may follow one after another. The skin barrier is damaged and it loses its protection.

Therefore, for the sake of healthy skin, when using glycolic acid, it must not be used with retinol. It should be selected carefully to ensure the effect of skin care without harming the skin.