Whether lactic acid and glycolic acid can be mixed is the key to chemical compatibility. Both are organic acids. Lactic acid is mild and is often used as a moisturizing and keratin softening agent in many skin care products. Glycolic acid is more active and is often used to rejuvenate and improve skin quality.

If you want to mix lactic acid and glycolic acid, you must consider carefully. First, pay attention to the concentration of the two. High concentrations of glycolic acid mixed with lactic acid may cause skin irritation to intensify, causing redness, swelling and tingling. It is recommended to start with a low concentration and gradually adjust it to observe the tolerance of the skin. Second, the pH value cannot be ignored. After mixing the two, the pH value may change, affecting its stability and efficacy. Appropriate acid-base regulators should be used to ensure that the pH of the mixture is in a safe and effective range. Third, the mixing process should follow the correct order and method. Generally speaking, it is recommended to dilute the two separately, then mix slowly, while stirring constantly to ensure uniform dispersion.

Furthermore, perform a local skin test before mixing. Apply a small amount of the mixture to sensitive areas such as the back of the ear or the inside of the arm, and observe for 24-48 hours. If there is no discomfort, it can be used on the face or other parts.

In short, although lactic acid and glycolic acid can be mixed, it is necessary to operate with caution, taking into account factors such as concentration, pH value and skin tolerance, so as to achieve the expected skin care effect and avoid damage to the skin.