Oranges contain a lot of vitamins A, B 1 and C, which are typical alkaline foods and can eliminate the harm of a lot of acidic foods to the nervous system. Eating oranges in moderation during the exam can make people energetic. In addition, lemon, citrus, grapefruit and so on. It has a similar effect and can replace oranges.

2. Corn

Corn germ is rich in unsaturated fatty acids such as linoleic acid, which can protect cerebrovascular and reduce blood lipid. Especially, the high water content of glutamic acid in corn helps to promote the metabolism of brain cells. Eating some corn often, especially fresh corn, has a brain-strengthening effect.

Step 3: peanuts

Peanut is rich in lecithin and cephalin, which is an important substance needed by nervous system. It can delay the decline of brain function, inhibit platelet aggregation and prevent cerebral thrombosis. Experiments show that eating peanuts regularly can improve blood circulation, enhance memory and delay aging, which is a veritable "longevity fruit".

4. Fish

Fish can provide high-quality protein and calcium for the brain. The fatty acids contained in freshwater fish are mostly unsaturated fatty acids, which will not cause arteriosclerosis and have no harm to cerebral arteries. On the contrary, they can protect the cerebral vessels and promote the activity of brain cells.