As the saying goes, "meat is better than no beans", which shows that beans play a very important role in our daily life. Soybean is called "vegetable beef", and the nutritional value of beans is beyond the reach of many foods. "Five grains are suitable for eating, and beans are bad if they are lost" also reflects the importance of legumes. Soybean contains about 35% protein, and the content of protein is much higher than that of wheat, rice, corn and sweet potato. Moreover, beans contain essential amino acids, and other grains will lack one or several amino acids.

Protein contained in soybean can supplement 8 kinds of amino acids needed by human body and significantly reduce the proportion of low-density lipoprotein in human blood, thus effectively protecting human heart. Soybean contains a lot of fat, which is different from animal fat and mostly unsaturated fatty acids. Even long-term consumption of beans will not induce hyperlipidemia or other cardiovascular diseases. There is also a lot of oil in soybeans. Soybean oil can be used for cooking, and regular consumption of soybean oil can prevent heart disease.

Soybean contains a large number of inorganic salts needed by human body, including trace elements such as potassium, calcium, iron, zinc, copper, magnesium and manganese. These trace elements are very important for human growth. For example, many of these trace elements can promote children's bone and body development, and regular consumption of beans can effectively slow down cell aging, thus achieving the effect of delaying aging.

Soybean contains a lot of vitamins, such as vitamin B 1, vitamin B2, vitamin D, vitamin E, vitamin PP, carotene and so on. Eating beans often can improve people's memory. In addition to the above functions, beans have other functions. For example, beans can reduce blood sugar concentration, prevent arteriosclerosis and promote the growth and development of brain cells.