On the effect of glycolic acid and salicylic acid on dark spots
Everyone wants to get rid of the problem of dark spots. In the way of skin care, glycolic acid and salicylic acid are often the choice to deal with dark spots. There is much to be investigated when comparing the effects of the two.

Glycolic acid belongs to the class of fruit acids, which have small molecules and can easily penetrate into the skin. Its effect on dark spots is to accelerate the metabolism of the stratum corneum. If the metabolism of the stratum corneum of the skin is slow, melanin is easy to accumulate, and dark spots arise. Glycolic acid can promote the shedding of old keratinocytes, make the skin surface renewed, melanin goes away, and dark spots fade. And it can stimulate collagen production, make the skin firmer, and dark spots are inconspicuous due to the improvement of skin texture.

Salicylic acid is also extraordinary. It has fat-soluble properties and can penetrate deep into pores. The cause of dark spots is partly due to clogged hair follicles, inflammation, etc. Salicylic acid can clean up oil and dirt in pores, reduce inflammation, and block the formation of dark spots from the root cause. At the same time, it can also regulate keratin metabolism, but in a slightly different way than glycolic acid. Salicylic acid moderately reduces the adhesion between keratinocytes, makes the stratum corneum more orderly, and inhibits melanin accumulation.

Glycolic acid removes dark spots, and the effect of shallow dark spots is quickly apparent, which can brighten the skin in a short time. However, its irritation is slightly stronger, and those with sensitive skin may be intolerant, so be cautious at the beginning of use. Salicylic acid is relatively mild and more targeted for dark spots caused by inflammation. Long-term use can improve the overall state of the skin. However, if the concentration of salicylic acid is too high or used improperly, it may also cause dry and peeling skin.

Those who want to remove dark spots should choose according to their own skin type. For those with strong skin tolerance, glycolic acid may take effect faster; for sensitive skin or inflammatory skin, salicylic acid is more suitable. Each has its own advantages and disadvantages. Only by using it well can the skin be whitened.