On the appropriate sequence of use of glycolic acid and retinoic acid
for medical health, the order of medication is related to the effect and damage. Glycolic acid and retinoic acid are both used for skin recuperation, but the method of succession cannot be ignored.

Glycolic acid has the power of gentle exfoliation, which can soothe the keratin, smooth pores, and rejuvenate the surface of the skin. Using it can make the skin initially moist and soft, opening the way for subsequent nutrient absorption.

Retinoic acid can promote cell metabolism, revitalize the skin's new energy, and has a special effect on improving skin texture, reducing wrinkles and anti-aging. However, it is strong, or cause skin discomfort.

Therefore, it is reasonable to use glycolic acid first. Glycolic acid gently opens the skin barrier, makes the keratin loose, and paves the way for the subsequent in-depth operation of retinoic acid. And glycolic acid first, can soften the skin state, relieve the intensity of retinoic acid, and reduce the risk of skin intolerance.

If retinoic acid is used first, because of its irritation, the skin may be sensitive. At this time, glycolic acid is used, and the double stimulation is superimposed, the skin is vulnerable, and redness, swelling, and tingling are feared.

In summary, in order to achieve the good effect of skin care and avoid discomfort, the order of "first use glycolic acid, then use retinoic acid" should be followed, so that the purpose of skin health and beauty can be achieved.