On the effect of glycolic acid and salicylic acid on pigmentation
Husband's skin pigmentation, many people have trouble. Among the various coping methods, the use of glycolic acid and salicylic acid can be quite studied.

Glycolic acid belongs to alpha-hydroxy acids. Its molecules are relatively small and can penetrate smoothly into the surface of the skin. Once inside, it can promote the renewal rate of keratinocytes. Because of skin pigmentation, it is often related to the slow metabolism of keratinocytes. If the metabolism of keratinocytes is orderly, it is difficult to accumulate pigment. Glycolic acid accelerates this metabolic process, so that the old keratinocytes containing excess pigment quickly leave the skin, thereby making the surface of the skin more uniform and the pigmentation gradually decreases.

Salicylic acid is a beta-hydroxy acid. It has lipophilic properties and can penetrate deep into hair follicles and sebaceous glands. In the prevention and treatment of pigmentation, on the one hand, salicylic acid can adjust the keratinization process of the skin, maintain the normal thickness and structure of the stratum corneum, and avoid uneven pigment distribution due to abnormal stratum corneum. On the other hand, its anti-inflammatory ability cannot be underestimated. Inflammation is often the cause of triggering or aggravating pigmentation. Salicylic acid inhibits the pigmentation pathway mediated by inflammation by anti-inflammatory power, thereby inhibiting pigmentation.

The combination of the two is complementary to each other. Glycolic acid mainly targets the renewal of keratinocytes on the surface of the skin, and salicylic acid takes into account the sebaceous glands of deep hair follicles and is anti-inflammatory. The synergy between the two may achieve better results in improving the problem of pigmentation. When using them, you also need to be cautious. Because both are irritating to a certain extent, those with sensitive skin should try them on a small scale first to check the tolerance of the skin. Only by using them reasonably according to the characteristics of the skin can you benefit from their ability to improve pigmentation and avoid the risk of skin damage.