On the Effect of Glycolic Acid Light Printing
The reason why glycolic acid is used to remove acne marks is quite profound. Glycolic acid belongs to the class of fruit acids and has unique characteristics.

Looking at its efficacy principle, glycolic acid molecules are tiny and can penetrate into the shallow layer of the skin without hindrance. It can promote the metabolism of stratum corneum cells to accelerate, the old stratum corneum can be shed quickly, and the skin surface renewal rate is accelerated. In this way, the pigment deposition originally caused by acne damage can be removed as the surface keratin is replaced, and the color of the imprint becomes lighter.

Furthermore, glycolic acid can stimulate the synthesis of collagen in the dermis. When acne strikes, the skin structure may be damaged, and collagen production may be affected. The intervention of glycolic acid can stimulate fibroblast activity and increase collagen production. The newly formed collagen can reshape the skin structure, fill the small depressions or irregularities caused by acne, and make the skin surface smoother. At the same time, the overall gloss and texture of the skin are improved, and the acne marks are no longer so conspicuous.

In order to achieve a good light printing effect, the use of glycolic acid is also particular. The choice of its concentration needs to be careful. Low concentration, although mild, the effect of light printing may be slightly slower; high concentration, although the effect is good, people with sensitive skin are prone to discomfort, such as redness and tingling. Therefore, for beginners, it is recommended to choose low concentration products first, and then gradually increase the concentration after skin tolerance test. And the frequency of use should not be excessive. It should be reasonably arranged according to personal skin conditions, or used every few days to avoid excessive burden on the skin.

In short, glycolic acid does have an effect on light acne marks, but users need to specify its characteristics and use it carefully in order to achieve the ideal light printing and skin beauty.