Comparison of Glycolic Acid and Salicylic Acid
Glycolic acid and salicylic acid are both acids used in skin care, but the characteristics and effects of the two are really different.

Glycolic acid belongs to alpha-hydroxy acid. Its molecules are small, can quickly penetrate the surface of the skin, and work in the stratum corneum. It often has excellent exfoliation function, which can loosen the connection between keratinocytes, make old keratin fall off, and make the skin surface smooth and radiant. And it can stimulate the production of collagen. Long-term use may reduce fine lines and wrinkles and help the skin maintain firmness and elasticity. Due to its small molecule and strong penetration, its irritation is relatively high. Those with sensitive skin may need to use it cautiously and try it on a small scale first.

Salicylic acid is a beta-hydroxy acid. This acid is lipophilic and can penetrate deep into the pores. For oily skin and acne skin, the effect is significant. It can remove oil and keratin accumulation in pores, prevent and improve acne, acne and other problems. And it has anti-inflammatory properties and can relieve redness, swelling and inflammation of acne skin. Because of its lipophilic properties, it is relatively mild and less irritating than glycolic acid. It can be used for most skin types, but high concentrations still need to be used with caution.

If the skin is dry and aging, with fine lines and roughness, glycolic acid may be a good choice to help exfoliate and stimulate collagen regeneration. If the skin is oily and prone to acne and acne, salicylic acid can penetrate deeper into the pores, clean oil, resist inflammation and eliminate acne. In short, choosing glycolic acid or salicylic acid can help the skin achieve better condition when used properly according to individual skin characteristics and needs.