1. Warm food, such as pepper, onion, ginger, garlic, leek, fennel, litchi, peach, almond, cherry, walnut, red date, glutinous rice, brown sugar, angelica and so on. These foods can increase vitality and make the body excited.

2. Cold food, such as mung bean, kelp, watermelon, banana, orange, mango, loquat, sugarcane, carambola, tomato, bamboo shoot, wax gourd, cucumber, tofu, lotus root, white radish, Chinese cabbage, spinach, honey, tea plantain, etc. These foods can clear away heat, purge fire and diminish inflammation.

3. Plain foods, such as apples, grapes, pineapples, rice, corn, peanuts, sesame seeds, broad beans, black beans and peas. This kind of food is not obvious in cold and heat, and it can be eaten by people of different constitutions.

4. nourishing foods, such as Korean ginseng, red dates, millet, yam, cherry, flax, brown rice, wheat, lotus root, etc. This kind of food is suitable for people with deficiency constitution.

5. Diarrhea foods, such as aloe, celery, tofu, asparagus, bananas, watermelons and pineapples. This kind of food has the function of metabolism and constipation improvement, and is suitable for people with solid constitution.

The linoleic acid content of corn is 2%, which is the highest in grain feed. If the proportion of corn in the diet is above 5%, only corn can meet the requirement of linoleic acid for pigs and chickens (1%). Modern research has confirmed that corn is rich in unsaturated fatty acids, especially linoleic acid, which is more than 6%. It can reduce the blood cholesterol concentration and prevent it from depositing on the blood vessel wall in synergy with vitamin E in corn germ. Therefore, corn has certain preventive and therapeutic effects on coronary heart disease, atherosclerosis, hyperlipidemia and hypertension.