The theory of "five grains" appeared in the Spring and Autumn Period and the Warring States Period. The Analects of Confucius: "Four bodies are not diligent, and five grains are not divided." But the explanations are different, one is millet, millet, wheat, rice; When it comes to millet, millet, wheat, millet and hemp.

The main difference between these two statements lies in the existence of rice and hemp. The reason for the disagreement is that there were more than five kinds of crops at that time, and the existence of the theories of "100-grain", "6-grain" and "9-grain" is a clear proof, and the varieties of crops in different places are different.

The popularity of the theory of "five grains" is obviously caused by the influence of the five elements. Therefore, generally speaking, grains refer to several major food crops.

Extended data:

Benefits of whole grains:

1, health

Whole grains are the staple food of human beings, which are rich in nutrition and have the effect of preventing and improving diseases, such as dietary fiber, which can effectively slow down the absorption of sugar, reduce the rising speed of blood sugar during meals and make insulin work, so it is also of great help to diabetic patients.

Vitamin c in whole grains can relieve fatigue symptoms and prevent civilized diseases such as colds and lower limb aches; Iron can prevent gastric ulcer and loss of appetite; Copper, zinc and other trace elements can improve the symptoms of mental weakness and insomnia, increase appetite, improve weight and adjust appetite. Potassium can also avoid muscle paralysis, depression and general weakness.

2. Cancer prevention

Beans in whole grains are rich in protein, amino acids and vitamin B, which have anti-cancer effects. Vitamin A is helpful to cell division in human body and prevent the formation of cancer cells. Moreover, rich dietary fiber can shorten the stay time of waste in the intestine, reduce the probability of carcinogens and intestinal mucosa, and help prevent constipation and colon cancer. Therefore, regular eating can prevent tumor lesions.

3. Prevent constipation

Coarse grains contain a lot of dietary fiber, which can help intestinal peristalsis, eliminate toxins and prevent constipation. Everyone knows the importance of fiber. Eating more fruits and vegetables can supplement dietary fiber, but it is often forgotten that coarse grains are an important source of dietary fiber.

In fact, the insoluble fiber in coarse grains is the most helpful to promote intestinal peristalsis, and it can be combined with various pollutants in food to take them out of the body and clean the intestines.

4, help to improve cardiovascular function.

Experiments have proved that soybeans and their products have special effects on cardiovascular system. Regular consumption of soybean food can effectively reduce serum cholesterol and help relieve the damage of arterial wall. Some scholars have found that soybeans soaked in vinegar can be used to treat hypertension and obesity.

Because the saponin in soybean can eliminate the fat attached to the blood vessel wall and reduce the cholesterol content in blood. In addition, sweet potato can promote cholesterol excretion, maintain arterial elasticity and prevent arteriosclerosis, thus reducing the occurrence of cardiovascular diseases such as hypertension.

Baidu encyclopedia-whole grains

People's Network-What are the benefits of eating more whole grains? Eating more coarse grains has many benefits.