What is the use of alpha-hydroxy acids (AHAs)?

Alpha-hydroxy acids (AHAs) are a commonly used ingredient in skincare products. AHAs work by promoting exfoliation in the outer layer of skin, resulting in a healthier looking, clearer complexion. Products containing AHAs became wildly popular in the 1990s-not only were the AHAs moisturizing and exfoliating, but also they were naturally derived from citrus fruit, apples, pears, and milk.

Because the ingredients were natural, people felt good about putting AHAs on their face to get clearer complexions. AHAs are one of the safest methods of skin renewal. Still, their effectiveness depends on the type and concentration of the AHA, the pH (acidity), and other ingredients in the topical product.

The AHAs used most often in cosmetics include glycolic acid and lactic acid, although there are many others, and many AHAs are used in combination.

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