Blueberries are known to be a powerful "super food," but their powers may be stronger than currently thought. Research has suggested that the antioxidant powers in blueberries may lower your risk of heart disease and cancer. Now, you may be able to add Alzheimer's to the list. A team of scientists at the University of Cincinnati says the antioxidants in blueberries benefits memory and cognitive function in some older adults. According to the studies, blueberries may only effectively treat patients who already show signs of mental impairment.