Phosphorus is called the salt of wisdom, and bananas contain phosphorus. At the same time, bananas are an excellent source of tryptophan and vitamin B6. It is also rich in minerals and high-quality protein, among which the potassium ion content is the highest, and a medium banana contains 45 1 mg of potassium. Eating bananas can strengthen the brain, improve eyesight and refresh the mind. Although bananas are rich in nutrition, they are low in calories, so you don't have to be afraid of being fat if you eat too much.

2. Macroalgae

Kelp is rich in iodine, which helps to dredge blood vessels, maintain the body's acid-base balance and resist fatigue. However, kelp also contains a lot of linoleic acid and lecithin, which can strengthen the brain and refresh the mind. Kelp, like other seaweeds, contains sulfones that are indispensable to the human brain.

3. Pumpkin

Pumpkin is rich in vitamin A and an excellent brain-benefiting element-β-carotene. Pumpkin tastes sweet and tastes flat, which can refresh the mind and improve the symptoms of neurasthenia and irritability. Eating once a day is very effective for nourishing the brain.

4. Walnut

Walnuts nourish the brain, which is well known. Walnut is rich in unsaturated fatty acids, which can avoid cerebral vascular occlusion, strengthen brain and improve intelligence. But walnut is a kind of dry food, so you can't eat too much, otherwise it will easily cause constipation and nosebleeds.