The skincare ingredient fights acne and aging.

Once a treatment reserved for doctors’ offices, acids are now available for at-home use in the form of serums, face washes, and peels. They have an exfoliating effect and can help with acne, redness, anti-aging, and discoloration when used properly and consistently, says Gervaise Gerstner, MD, a dermatologist based in New York City. Over-the-counter products are higher on the pH scale, meaning they’re less acidic and don’t penetrate the skin as deeply as acids used during professional treatments. Translation: they can be part of a daily skincare routine. 

Try one of the following expert picks to address common skin concerns.