"Blueberries are often singled out as a superfood because studies have shown they aid in everything from fighting cancer to lowering cholesterol. But all berries, including raspberries, strawberries and blackberries, contain antioxidants and <a href='http://www.webmd.com/diet/phytonutrients-faq' target='_blank'>phytonutrients</a>. Worried about the price of fresh fruit? Experts say frozen berries are just as ""super."""