On the appropriate sequence of use of glycolic acid and nicotinamide
for skin maintenance, the combination of ingredients is related to the effect. Glycolic acid and nicotinamide are both commonly used agents for skin care, and they are used in sequence, which is quite exquisite.

Glycolic acid, a fruit acid, has the ability to exfoliate. It can make the old keratin on the surface of the skin fall off, promote the metabolism of the skin, and make the skin rejuvenated. However, it is slightly strong in nature, used improperly, or cause skin discomfort, such as redness, tingling, etc.

Niacinamide has various functions. It can block the transfer of melanin and brighten the skin; it can also strengthen the skin barrier and reduce water loss. And the nature is relatively stable and the irritation is small.

Therefore, in the light of skin care, glycolic acid should be used first. After exfoliating with glycolic acid, the skin absorbs nicotinamide better. And remove the old keratin first to avoid the risk of hindering the absorption of nicotinamide due to the accumulation of keratin.

However, it should be noted that those with sensitive skin should be tested first. Use glycolic acid on the local skin first to observe its reaction. If there is no discomfort, it can be expanded. And after using glycolic acid, the skin may be fragile, so it should be carefully protected and moisturized and protected from the sun.

In this way, use glycolic acid and nicotinamide in sequence to achieve the good effect of skin care and make the skin radiant and healthy.