On the Effect of Lactic Acid and Glycolic Acid on Pigmentation
In today's skin pigmentation, lactic acid and glycolic acid are quite eye-catching in skin care.

Lactic acid is mild and has unique effects. Its molecules are large and can slowly penetrate the skin. It can not only loosen the connections between keratinocytes, but also make the old keratin on the surface of the skin shed, achieving the effect of rejuvenation, and is also good for moisturizing. In pigmentation, lactic acid can promote the metabolism of the epidermis, accelerate the shedding of keratinocytes containing excess pigment, and stimulate the production of collagen in the dermis, improve the texture and color of the skin, and then reduce the appearance of pigmentation.

Glycolic acid has the advantage of small molecules and has strong penetration. It can quickly reach the deep layer of the skin, peel off the keratin efficiently, and accelerate cell replacement. When dealing with pigmentation, glycolic acid can effectively interfere with the process of melanogenesis, inhibit tyrosinase activity, reduce melanin synthesis and transport, thereby significantly diluting pigmentation and making the skin color more uniform.

However, both are also appropriate. Lactic acid is relatively mild and suitable for people with sensitive skin. Long-term use can gradually improve pigmentation, and the irritation is small. However, because of its mild effect, for severe pigmentation, the effect may take time to appear. Although glycolic acid has significant effect, it is easy to cause redness, swelling, tingling and other discomfort when used on skin with poor tolerance. Therefore, the use of glycolic acid requires a skin tolerance test first, and it starts with low-concentration products and gradually adapts.

In summary, to reduce pigmentation, the choice of lactic acid or glycolic acid should be carefully selected according to individual skin characteristics, tolerance and pigmentation severity. Or lactic acid can be used to lay the foundation of the skin first, and then supplemented with glycolic acid to strengthen the effect when tolerated. This is a good strategy for reasonable skin care and improve pigmentation.