On the Association between Glycolic Acid and Pigmentation
In modern times, there are various opinions that glycolic acid is suspected to cause pigmentation. Or improper use of glycolic acid can indeed lead to pigmentation.

Glycolic acid is active and has a great metabolic help in the stratum corneum of the skin. However, individual skin is unique. If the skin is sensitive and fragile, rashly use glycolic acid, and the concentration and frequency are inappropriate, and the skin is changed due to stress. Its epidermal melanocytes are stimulated, and the activity of tyrosinase increases sharply, resulting in excessive melanogenesis, and then pigmentation.

And those with damaged skin barrier, when using glycolic acid, external stimuli are more likely to invade. The skin is controlled by it, melanin production is also becoming more active, and the trend of pigmentation is gradually rising. However, there are also dissidents who say that if glycolic acid is used properly, it will not only prevent pigmentation, but also help fade pigmentation. The reason is that glycolic acid can promote keratin renewal, and melanin particles peel off with the keratin, resulting in a uniform skin color.

To investigate the relationship between glycolic acid and pigmentation, users must carefully review their own skin characteristics, abide by the norms of use, and gradually, in order to avoid the harm of pigmentation and gain the benefits of beautiful skin.