Here are some of the best brain foods to consider eating before your exam: Fatty fish (salmon, and sardines which are high in omega-3 fatty acids), nuts and seeds (walnuts, almonds, pumpkin seeds), whole grains (brown rice, oatmeal, quinoa), leafy greens (spinach, kale, and broccoli), berries (blueberries, strawberries, and raspberries which are high in antioxidants), eggs (fine source of choline), and dark chocolate (contains flavonoids that can help to improve blood flow)