Raspberries. Blueberries. Strawberries. Black berries. All of these berries provide antioxidant power, which helps to boost your immune system. However, the berry with the most antioxidant power by far is the Goji berry. Enjoy this must-eat berry for savionaires by snacking on Trail Power by Navitas Naturals. This trail mix, which is 70% organic, contains: Goji berries, Inca Golden berries, Mulberries, Cashews and Cacao nibs. This certified kosher mix will boost your energy and endurance to help you stay on the go. Trail Power is available at health food stores.