Glycolic acid should not be used in combination with anything
Glycolic acid. It is quite common in skin care products and has the effect of rejuvenating and brightening the skin. However, when using it, be careful not to use it in combination with the following types of substances to avoid damage to the skin or reduce the effect.

First is a strong alkaline substance. Glycolic acid is acidic. If it is mixed with a strong alkaline substance such as sodium hydroxide, it will cause acid-base neutralization. This not only causes glycolic acid to fail, but also may produce irritating substances, causing skin discomfort, redness, itching in light cases, or rash and molting in severe cases.

Second is retinoic acid. Glycolic acid is used in combination with retinoic acid, or greatly increases skin irritation. Both have the ability to promote keratin metabolism, and the same use makes the stratum corneum peel off too dramatically, the skin's defense is reduced, and it is easy to cause sensitivity, dryness, and even burns.

The other is high-concentration salicylic acid. Both glycolic acid and high-concentration salicylic acid can exfoliate, and the same use can easily make the stratum corneum too thin, the skin becomes sensitive, and the tolerance to environmental stimuli is reduced, causing redness, tingling, etc.

and benzoyl peroxide. When glycolic acid encounters it, it may react chemically, causing the inactivation of benzoyl peroxide, reducing its anti-acne and sterilization effect, or irritating the skin.

In general, when taking care of your skin, before using glycolic acid products, you must read the ingredient list carefully to avoid things that are mutually exclusive, so as to keep your skin healthy and enjoy the benefits of glycolic acid skin care.