On the combination of nicotinamide and glycolic acid
The way of skin care, the combination of ingredients, related to efficacy and skin feel, is the key. Niacinamide and glycolic acid, both are wonderful skin care products, but the combination method should be carefully studied.

Niacinamide can inhibit the transport of melanin, make the skin uniform and shiny, and can strengthen the skin barrier and reduce the loss of moisture. Glycolic acid is a fruit acid and the like, which can exfoliate the keratin, promote cell renewal, make the skin smooth and delicate, and also help to eliminate acne marks and slow down fine lines.

If the two are mixed, caution is required. Glycolic acid is partial acid, and niacinamide may be converted into niacin in an acidic environment. Niacin, although it also has the ability to care for the skin, is highly irritating, or causes skin discomfort, such as redness, itching, tingling, etc.

Therefore, if you want to mix niacinamide and glycolic acid, you should first test the tolerance of the skin. A small amount of the mixture of the two is recommended, apply it behind the ear or on the inside of the arm, and wait for a while to see if there is any adverse reaction. If there is no discomfort, it can be gradually used on the face. And when mixing, the concentration should be low, and the frequency should be small when initially used. Wait for the skin to adapt, and then adjust it as appropriate.

Or use it in time-sharing. Use nicotinamide during the day to take advantage of its protective screen and brighten the skin, and use glycolic acid at night to promote keratin renewal while the skin is repairing. This time-sharing application can avoid the possible harm of using the two at the same time, and get the benefits of skin care.

In short, the mixture of skin care ingredients is essential for skin comfort and efficacy. Use nicotinamide and glycolic acid with caution to benefit the skin.