Many dermatologists and estheticians are not fans of St. Ives exfoliating scrubs because they are too harsh for your skin. In 2016, a lawsuit was filed against St. Ives that claimed that the crushed walnut shells used in its scrubs were actually causing damage to users' skin,(via Glamour). Though the lawsuit was thrown out in 2018, it called attention to the potential harm caused by the brand's harsh exfoliants.

Crushed walnut shells have sharp, jagged edges that can cause microtears due to physical abrasion when you use them to scrub your face. Although your skin might feel baby-smooth when you pat it dry, microtears can cause your skin to become more sensitive, and leave it dry, flaky, and red. Over time, this can reduce your skin's ability to heal itself and accelerate your skin's aging process.

Instead of nut-based manual exfoliants, Chicago-based dermatologist Dr. Faiyaaz Kalimullah recommends chemical exfoliants. "Rather than physically scraping off the top layers of skin, these products use mild chemical solutions to gently exfoliate the skin," Dr. Kalimullah told The List.

Dr. Kalimullah recommends that you look for chemical exfoliants that contain glycolic acid, which is an alpha hydroxy acid (AHA) that is found in milk and fruit sugars. "AHAs like glycolic acid have the added benefit of being collagen stimulators that can help reduce the appearance of fine lines and wrinkles," noted Dr. Kalimullah.