Best brain-nourishing food: The best brain-nourishing foods are spinach, leeks, pumpkins, onions, broccoli, green peppers, beans, tomatoes, carrots, small vegetables, garlic leaves, celery, walnuts, peanuts, pistachios, cashews, pine nuts, almonds and soybeans. Because these foods contain carotene, superoxide dismutase and other ingredients, they can prevent cerebrovascular diseases and protect the brain, so they are the first choice for mental workers.