When it comes to glycolic acid, which cannot be mixed with glycolic acid
, it is common in skin care agents. Its effect is to exfoliate and promote skin metabolism. However, there are also things that cannot be mixed with glycolic acid. If used, it may damage the skin and should not be careless.

First, strong alkali substances should not be mixed with glycolic acid. Glycolic acid is acidic, and strong alkali will cause a violent chemical reaction when it encounters it. If a strong alkali such as sodium hydroxide is mixed with glycolic acid, the acid-base neutralization will not only lose its skin care effect, but also generate a lot of heat, damage the skin, cause redness, swelling, tingling, and even ulceration, so it should be avoided.

Second, high-concentration retinoic acid should not be used in combination with glycolic acid. Tretinoic acid can promote keratin metabolism, and the same is true for glycolic acid. The two are used together. Although the original intention may be to increase the effect of skin care, exfoliation is too severe, and the skin barrier is damaged. The skin is prone to dryness, desquamation, sensitization to environmental stimuli, and redness, which is harmful to skin health.

Third, benzoyl peroxide is also incompatible with glycolic acid. Benzoyl peroxide has strong oxidative properties, combines with glycolic acid, or causes structural changes in glycolic acid, losing its activity. And the mixed use of the two greatly increases the irritation of the skin and triggers allergic reactions, such as itching, rashes, etc., which is not conducive to skin maintenance.

In short, when using glycolic acid for skin care, it must be clear that it cannot be mixed. Review the ingredients of skin care agents carefully before use, or consult a professional to ensure skin safety and gain skin care benefits.