The best foods for your brain are also helpful for your heart and blood vessels. Experts agree that leafy greens, some fatty fish and berries are good for brain health. Trying to eat less processed and refined foods will also improve your diet and your level of energy. Paying attention to what you drink is just as important as what you eat. Sodas, juices and fancy coffees are often high in sugar. Reading labels and being a well-informed consumer will allow you to make better choices regarding your nutritional health.