The difference between retinoic acid and glycolic acid

Retinoic acid is a derivative of vitamin A, which is crucial in the regulation of skin cell metabolism. It can promote the renewal of stratum corneum cells, accelerate the shedding of skin surface cells, and can penetrate deep into the dermis, stimulate the synthesis of collagen and elastic fibers, and has significant effects on improving wrinkles, fading pigmentation, and treating acne. However, it has a certain degree of irritation. The skin of the first user may feel red, swollen, desquamation, and tingling, and it is sensitive to light. It needs strict sun protection during daytime use, otherwise it will easily cause sunburn and tanning, which will exacerbate skin problems.

Glycolic acid is a fruit acid, which is an alpha-hydroxy acid extracted from sugar cane. It mainly acts on the surface of the skin, which can loosen the connection between keratinocytes, promote the shedding of the stratum corneum, make the skin smoother and more delicate, and also help to improve dull and brighten the complexion. Glycolic acid is relatively mild and less irritating than retinoic acid. It is suitable for a variety of skin types, including sensitive skin. However, high-concentration glycolic acid products can still cause skin discomfort, such as slight tingling and redness, when used improperly.

As far as applicable skin types are concerned, retinoic acid is suitable for skin that is well tolerated and has anti-aging and acne treatment needs; glycolic acid is more universal, and sensitive skin can also benefit if low-concentration products are used cautiously. In terms of frequency of use, the initial frequency of use of retinoic acid should be low, such as 1-2 times a week, which can be gradually increased to once a day with the improvement of skin tolerance; products with low concentration of glycolic acid can be used daily, and those with high concentration need to depend on skin tolerance, 1-3 times a week.

The two have different skin care effects. Retinoic acid focuses on deep anti-aging and acne treatment; glycolic acid focuses on surface rejuvenation and brightening. Users should make careful choices according to their own skin type and skin care purposes, and should pay attention to skin reactions when using, and consult a professional if necessary.