On the effect of glycolic acid on melasma
There are skin diseases called melasma in the world, which plagues everyone. Today, the effect of glycolic acid on melasma is of great concern to doctors and patients.

Glycolic acid belongs to fruit acids. Its molecules are small and its penetration is good. Apply to the skin, and it can quickly reach the deep layers of the skin. Because of the bond between keratinocytes, glycolic acid can loosen it, causing old keratin to fall off and accelerating skin surface renewal.

To observe the cause of melasma, it is mostly due to the disorder of melanin metabolism, which is active in melanocytes, resulting in excessive melanin production and uneven distribution. Glycolic acid can act on the metabolic pathway of melanin. First, it can inhibit the activity of tyrosinase, which is the key to melanin synthesis. If the activity is inhibited, the amount of melanin produced will decrease. Second, accelerate the turnover of epidermal cells, melanin granules will fall off with old cells, and skin pigmentation will gradually fade.

However, it is also advisable to use glycolic acid to treat melasma. Its acidity is irritating to a certain extent. Those with sensitive skin may feel tingling and redness when used for the first time. Therefore, a skin test is required before use, and the initial concentration should be low, and then gradually increase. When used, it should be adjusted according to skin tolerance to avoid skin damage caused by excessive stimulation.

In short, glycolic acid has the effect of improving melasma. However, when treating, the patient in need of medical treatment should use it reasonably according to the patient's skin type and condition, and the patient should follow the doctor's advice, so as to achieve good results and whiten the skin.