Not only is sunblock the best anti-aging product that someone can use but it is a necessity for people who are using products that contain Alpha Hydroxy Acids, Beta Hydroxy Acid or any product that has an exfoliating property. Reason being that these active ingredients are meant to “slough away” the Stratum Corneum, or the dead-cell layer, that is actually your bodies natural protective shield. The Stratum Corneum protects your face from environmental factors, such as sun rays and air pollution.