Exfoliants have become increasingly common ingredients found in many skin care formulations. The benefits of exfoliants rest with their regenerative effect on the skin by accelerating the shedding of dead skin cells and outer layers of the skin that tend to be thicker. The regular use of products containing exfoliants, such as alpha hydroxy acids (AHAs), can soften fine lines, reduce pigmentary imperfections and improve texture – these combined effects can result in a smoother overall complexion. Common AHAs include lactic acid and glycolic acid. Stronger formulations of AHAs that are used by professionals are purported to promote collagen production and improve skin elasticity. Beta hydroxy acids, such as salicylic acid, improve acne by opening pores and preventing scaling and roughness. Overuse of exfoliants can cause skin irritation. If you have sensitive skin, test the product on a small patch of skin first before expanding use over the rest of your face.