Comparison of Azelaic Acid and Glycolic Acid
Azelaic Acid and Glycolic Acid are both eye-catching ingredients in the field of skin care. The two have different effects and differences in application.

Azelaic Acid is derived from nature and is mostly found in grains. It is mild in nature and has multiple effects. First and foremost, it can effectively inhibit the growth of Propionibacterium acne, which is the culprit of acne. Azelaic acid can reduce its number, thus achieving the effect of anti-acne. Furthermore, it can interfere with the activity of tyrosinase, which is related to the synthesis of melanin. Azelaic acid inhibits it, so it has the ability to lighten spots and whiten, and can even out skin tone, making skin color more harmonious. In addition, azelaic acid also has a soothing effect on inflammation, which can relieve skin redness, swelling, tingling and other discomforts.

Glycolic acid is an alpha-hydroxy acid with very small molecules, which can quickly penetrate the surface of the skin. Its most significant effect is to promote the renewal of the stratum corneum. It can loosen the connections between keratinocytes, allowing old keratin to fall off smoothly, making the surface of the skin new and smoother to the touch. At the same time, it accelerates metabolism and stimulates the production of collagen. Long-term use can make the skin firmer and wrinkles fade. In terms of improving skin dullness, glycolic acid can remove the accumulated dull keratin and brighten the complexion.

However, the two are also different. Azelaic acid is mild in nature and suitable for a variety of skin types, including sensitive skin, rarely triggering allergic reactions. Although glycolic acid is effective, it is highly irritating. When initially used, some people may experience slight tingling and redness. Therefore, people with sensitive skin need to try it carefully and establish tolerance before normal use. In whitening light spots, azelaic acid focuses on inhibiting melanin production; glycolic acid mainly brightens the complexion indirectly by removing dull keratin. In the field of anti-acne, azelaic acid directly targets acne-causing bacteria, while glycolic acid prevents acne by renewing the keratin and preventing clogged pores.

For the best effect of skin care, you need to carefully choose azelaic acid or glycolic acid products according to your skin type and needs. For dry and sensitive skin, azelaic acid may be preferred; for oily and well-tolerated skin, glycolic acid may bring more significant improvement.