On whether glycolic acid and nicotinamide can share
the principle of skin care, the combination of ingredients is related to the effect and skin comfort. Glycolic acid and nicotinamide are both commonly used agents for skin care, but whether they can be used together, there are different opinions, and it is urgent to determine.

Glycolic acid is a type of fruit acid, which has the ability to exfoliate. It can loosen the connection between keratinocytes, make old keratin shed, and accelerate skin surface renewal. Therefore, it can make the skin delicate and shiny, and has the effect of improving dull skin tone and fading fine lines.

Niacinamide is a derivative of vitamin B. Its function is to regulate the oil secretion of the skin, shrink pores, improve the skin barrier, and inhibit the transfer of melanin to the epidermis, so as to brighten the skin tone.

Or glycolic acid and niacinamide cannot be used together, because glycolic acid is acidic, niacinamide may hydrolyze into niacin in a low pH environment. Niacin may cause skin discomfort, such as redness, tingling and other allergic symptoms.

However, there are also different opinions. If the concentration of the two is suitable and the skin is well tolerated, it is not impossible to use them together. Studies have shown that under appropriate conditions, the two cooperate, or can increase the power of skin care. Glycolic acid promotes keratin renewal and can help nicotinamide penetrate better; the stability-maintaining effect of nicotinamide may relieve the irritation caused by glycolic acid.

If you want to use both of these on the skin, you should be cautious. Test skin tolerance first, apply a small amount of product to the local skin, and observe its reaction. If there is no discomfort, you can gradually increase the dosage and frequency of use. And it is recommended to start with a low concentration, and wait for the skin to adapt before making adjustments.

In short, whether glycolic acid and nicotinamide can be used together, your mileage may vary. According to your own skin characteristics, weigh the advantages and disadvantages, and make a prudent choice, in order to seek the best effect of skin care and keep the skin healthy.