Washington Esthetician State Board Practice Exam 2026 – Complete Prep Resource

Alphahydroxy acids (AHAs) are primarily known for their ability to exfoliate the skin, particularly by affecting the stratum corneum, which is the outermost layer of the epidermis. AHAs, such as glycolic acid and lactic acid, work by loosening the bonds between dead skin cells, making it easier for them to slough off. This process leads to a smoother, more refined skin texture and can also enhance cell turnover, promoting a more youthful appearance.

While AHAs can have secondary benefits related to hydration, anti-aging, and reducing the appearance of acne scars, their primary mechanism of action is indeed exfoliation. By removing the buildup of dead skin cells, AHAs help reveal fresher skin beneath, making this process central to their effects and usage in skincare products.

In contrast, hydration focuses on moisture content, which is not the main function of AHAs. Although they can contribute to anti-aging by promoting skin renewal, the primary action remains exfoliation. Reducing acne scars is more of an indirect benefit that may occur due to the resurfacing effect, but it is not the core action associated with AHAs.