Blueberries were an important part of the Native American diet for hundreds of years. They have a sweet taste when mature, with variable acidity. Mostly good things come in small packages — and that’s especially true for the blueberry. Blueberry contain highest antioxidant levels out of any fruit and possesses a number of different nutrients that can power your brain and body. Anthocyanin, which gives these berries their blue hue, is a powerful antioxidant.