What function do alpha hydroxy acids (AHA's) and beta hydroxy acids (BHAs) primarily serve?

Alpha hydroxy acids (AHAs) and beta hydroxy acids (BHAs) primarily serve as exfoliants, which is why the selected answer is correct. These acids work by removing dead skin cells from the surface of the skin, promoting cell turnover and revealing fresher, smoother skin underneath. AHAs, derived from fruits, are water-soluble and primarily benefit the outer layer of the skin, making them effective for enhancing skin texture and tone. BHAs, which are oil-soluble, penetrate deeper into the pores, making them particularly effective for oily and acne-prone skin, as they help clear out excess sebum and prevent breakouts.

These exfoliating properties not only improve the skin's appearance but can also enhance the effectiveness of other skin care products by allowing better absorption. While AHAs and BHAs can also contribute to brightening the skin, their primary function remains exfoliation. Other options, such as moisturizers, brightening agents, or antioxidants, serve different purposes in skin care and do not primarily possess the exfoliating benefits associated with AHAs and BHAs.