Comparison of Glycolic Acid, Lactic Acid and Salicylic Acid

The way of skin care, the effect of acids, everyone has heard. This article discusses Glycolic Acid, Lactic Acid and Salicylic Acid to clarify their differences and help people choose.

Glycolic Acid belongs to the α-hydroxy acid (AHA) class. Its small molecule can quickly penetrate the stratum corneum of the skin and promote keratin renewal. Often used in low concentrations for skin care, it can exfoliate old and waste, making the skin smooth and uniform in color. If the skin is dull and rough, it has a rejuvenating effect. However, its irritation is slightly stronger, and those with sensitive skin need to be careful when using it for the first time. It is advisable to start with low concentration and less frequency.

Lactic acid is also a member of the α-hydroxy acid family. The molecule is slightly larger than glycolic acid and has better mildness. In addition to the work of exfoliation metabolism, it has good moisturizing properties. Because it is similar to the skin's natural moisturizing factor, it can retain water on the skin and make the skin hydrated. Suitable for dry and sensitive skin, it exfoliates and moisturizes without drying the skin.

As for salicylic acid, it is beta-hydroxy acid (BHA). Its fat-soluble properties can penetrate deep into the pores, clean the oil and dirt in the pores, and have a significant effect on oily skin problems such as acne and acne. It can dredge pores, prevent acne formation, and make the skin refreshing. However, long-term high-concentration use may cause dry and desquamation of the skin, so it should also be used in moderation for oily skin.

Compared with the three, glycolic acid has strong skin rejuvenation and high irritation; lactic acid gently moisturizes, suitable for a variety of skin types, especially those with sensitive dryness; salicylic acid specializes in solving oily skin pores. Users should choose carefully according to their own skin type to achieve the best skin care.