Açai is a fruit hailing from Brazil. Its ORAC score (a measure of its antioxidant capacity) is among the highest of any foods. Açai gets its antioxidants from the anthocyanins and proanthocyanidins that also give it its purple color. Studies have shown that consuming açai may increase the levels of antioxidants in the blood, help raise good HDL cholesterol, and improve vascular function.