AHAs, or alpha-hydroxy acids, are a type of exfoliating acid that are naturally occurring in sugarcane (glycolic acid), milk (lactic acid), and fruit sources (citric acid) . They work by gently eliminating dead skin cells to help improve skin’s overall appearance and texture. AHAs have become increasingly popular over the last decade in skincare products aimed at minimizing signs of skin aging—such as fine lines and wrinkles, photoaging, and discoloration. Some of the benefits of AHAs include promoting collagen and blood flow, correcting discoloration from scars and age spots, improving the appearance of surface lines and wrinkles, preventing acne breakouts, brightening complexion, and increasing product absorption. AHAs are primarily used to exfoliate the skin, and they can remove rough or flaky skin without causing irritation, reducing the appearance of dry skin, blemishes, and keratosis pilaris. The most popular AHAs used on skin are glycolic acid and lactic acid. AHAs are generally considered safe and effective exfoliating options, but they may not be suitable for everyone. People with preexisting skin conditions should talk to their dermatologist or skin care specialist first before trying these types of products.