On the Compatibility of Glycolic Acid, Retinol and Niacinamide
The way of skin care, the compatibility of ingredients, related to efficacy and skin safety, must not be ignored. Today, whether glycolic acid, retinol and niacinamide can be used together is a matter that skin care people often study.

Glycolic acid, belongs to the fruit acid family, is active, can exfoliate, promote skin metabolism, rejuvenate skin luster, smooth and delicate skin. However, it is strong and irritating, and those with delicate skin may feel uncomfortable using it.

Retinol, also known as vitamin A alcohol, has significant effect on skin care, can adjust skin cell metabolism, increase collagen synthesis, reduce wrinkles, close pores, and make skin firm and elastic. However, its photosensitivity is strong, and it is irritating to the skin. Beginners often need to gradually build up tolerance.

Niacinamide is a derivative of vitamin B3, which can inhibit melanin production, even skin tone, shrink pores, and has moisturizing effects. It is milder in nature and is mostly suitable for the skin.

As for whether these three can be used in combination, it should be viewed with caution. Glycolic acid and retinol are both irritating. The same use may cause skin irritation to superimpose, causing redness, swelling, tingling, peeling and other diseases. If the skin has strong tolerance, you can try the same use in a small range and low concentration first, and pay attention to the interval when using it, such as using it separately in the morning and evening to reduce irritation.

Niacinamide is compatible with glycolic acid and retinol, which is theoretically feasible. Niacinamide is mild in nature and can buffer the irritation of glycolic acid and retinol. However, some people use niacinamide with high concentration glycolic acid, or have a "niacin reaction", such as skin redness and itching. Therefore, it is advisable to do a local trial before use.

In general, if you want to use glycolic acid, retinol and nicotinamide together, you must predict your own skin characteristics. If the skin is sensitive, avoid using all three; those with strong skin tolerance can gradually try it at a low concentration and in a small range, and closely monitor the skin's reaction. If there is any discomfort, stop using it. In this way, the effect of skin care and the safety of the skin can be maintained.