1. Day lily. It contains a lot of chlorophyll, which has the function of strengthening the brain and improving intelligence. It is not suitable to eat raw or stir-fried, but it is better to eat dry and cooked.

2. Pepper. The content of vitamin C in pepper ranks first among vegetables, and it is also rich in carotene and vitamins. The capsaicin contained in pepper can stimulate taste, increase appetite, promote blood circulation in the brain, and make people energetic and active in thinking.

3. Spinach. Although spinach is cheap and unremarkable, it is a brain-nourishing vegetable. Spinach is rich in vitamin A and is one of the "best suppliers" of brain cell metabolism.

4. oranges. Oranges contain a lot of vitamin A, which is a typical alkaline food, and can eliminate the harm caused by a lot of acidic food to the nervous system.

5. pineapple