Blueberries are some of the healthiest foods available to us. But one of the more recent findings on blueberries is how they can also be beneficial to the mind. Both blueberries and strawberries have been shown in studies to hold off cognitive decline in older people by 2 1/2 years. Blueberries and strawberries are both high in flavonoids which are natural chemicals that exert powerful effects in our bodies. Researchers found that theses two berries reduce cognitive decline in older adults. The results suggest that cognitive aging could be delayed by up to 2.5 years in elderly who ate both blueberries and strawberries. Why wait until you get old? Be sure to include these two healthy berries in your diet on a regular basis.