On the combination of glycolic acid and nicotinamide
The way of skin care, the compatibility of ingredients, is related to efficacy and skin suitability. Glycolic acid, a type of fruit acid, has the power of skin rejuvenation, can exfoliate, promote skin metabolism, make skin smooth and radiant, and has a good effect on improving skin texture and reducing fine lines. Niacinamide, can block melanin transport, brighten skin, can also regulate oil content and strengthen skin barrier.

However, whether the two can be used together, there are different opinions. It is said that the combination of the two may have antagonistic effects. Glycolic acid lowers the pH value of the skin. Niacinamide is in an acidic environment or converted to niacin. Niacin irritates the skin, causing redness, tingling and other discomfort.

However, studies have also shown that if the concentration of the two is appropriate and the method of use is appropriate, they can also be safe. For example, clean the skin with a gentle cleansing first, wipe it dry, and wait for the skin to dry slightly. Take an appropriate amount of nicotinamide-containing products, apply them lightly and massage until absorbed. Wait for them to form a film to protect the skin, and then apply glycolic acid products thinly, and control the dosage and residence time. Start with low concentration and short time, and gradually adapt. In this way, you may get the benefits of both, while avoiding the harm of discomfort

After all, the skin is different and tolerates different ingredients. If you want to use glycolic acid and nicotinamide together, you should try it locally first to observe the skin's reaction. If there is any discomfort, stop using it and ask a professional for advice to protect the skin and achieve a good skin care environment.