On the reasons for the darkening of skin tone caused by glycol acid
In modern skin care, glycol acid is quite commonly used, but it may be said that it is used to darken skin tone. The reasons for this should be investigated in detail.

Glycol acid belongs to the class of fruit acids, and its molecules are tiny and can quickly penetrate the surface of the skin. It is common sense that it can promote the renewal of the stratum corneum, make the skin tender and smooth, and seem to improve the symptoms of pigmentation and fine lines.

Causes the darkening of skin tone, one of which may be due to skin irritation. If glycolic acid is used improperly, if the concentration is too high or the frequency is too dense, the skin will suddenly feel irritated. In order to resist this disturbance, the body will be stressed, melanocytes will be active, melanin production will increase sharply, and the skin tone will be darker. If the soldiers are approaching the city, the citizens will be on guard and ready. Melanin is also a tool for the citizens to defend against the enemy.

Second, the lack of sun protection is also a major factor. After the use of glycolic acid, the skin's sensitivity to light increases. If it is exposed to sunlight and not well protected, ultraviolet melanocytes and melanin will be produced in large quantities, and the skin will darken especially quickly. For example, in a newly refurbished house, the wall paint is not solidified, and it will be eroded by wind and

Third, individual differences cannot be ignored. People have different skin types and have different tolerances to glycolic acid. Or people with delicate skin are prone to allergies and dull color. After using glycolic acid, the appearance of darkening skin tone is more obvious. Just like different plants and trees, in case of drought and flood disasters, the tolerance is different, and the damage is also different.

Therefore, those who use glycolic acid for skin care should choose the appropriate concentration according to their skin type, control the frequency of use, and practice sun protection with caution. In this way, they can get the benefits of skin care and avoid the harm of darkening skin tone.