We shed around 500 million skin cells from our body every day, so dead skin cells can build up pretty quickly. As a minimum, most experts advise that you exfoliate two to three times per week, depending on the type of product you use. For most skin types, chemical exfoliants like salicylic acid and glycolic acid, found in products like Blemish And Age Cleansing Gel, are generally suitable for everyday use. However, physical exfoliants may be too abrasive to use more than once or twice per week. An exception to this is SkinCeuticals Micro-Exfoliating Scrub, which is suitable for daily use. Individuals with sensitive skin may also wish to exfoliate just once or twice per week.