Growing on palm trees in the Amazonian rainforest, this Brazilian berry is rumored to be the best super food around. With its high-fiber, high-protein and low-sugar content, açaí can be found in smoothies, frozen yogurts, juices and even alcoholic beverages. Though their nutritive benefits are on par with blueberries, cranberries and strawberries, açaí berries boast ten times the amount of antioxidants found in red grapes. Antioxidants, which are good for the blood, reduce high blood pressure and can prevent heart disease.