Soybean is native to northern Chinese mainland, and it can be found in the remains of ancient tombs in China in the 2nd century BC, with a long history. Later, in the age of rope, it spread to Japan through the Korean peninsula. There are many varieties with black, green and mottled colors, which can be used as food, feed and industrial raw materials. It is one of the important crops in the world, but at present, the output of the United States ranks first in the world.

The proportion of essential amino acids in soybean protein is close to that of animal protein, and it is an important source of protein. Its fat is different from animal fat, and it contains a lot of unsaturated fatty acids and lecithin, which can make blood not coagulate easily. Gleditsia sinensis has the functions of cleaning blood vessels and promoting urine excretion. Therefore, soybean is one of the indispensable foods in preventing hypertension, stroke and heart disease. In addition, dietary fiber, vitamins and minerals are also abundant. In order to prevent constipation, fatigue and maintain a healthy body, we should eat soybeans like fish and meat.

As we all know, soybean is an outstanding nutritious food, which can grow even on the barren land. Protein is about 35%, fat is about 20%, and it is also rich in B vitamins. Soybean not only contains rare amino acid and tryptamine acid in plants, but also contains a large amount of aspartic acid which is helpful to nutritional metabolism, as well as linseed oleic acid and lecithin which are helpful to prevent arteriosclerosis. Unfortunately, however, no matter how cooked or fried, mature soybeans are not easy to digest, and only 70% of their rich nutrients can be absorbed by the human body. So people came up with a variety of processed foods, miso, soy sauce, natto, tofu, bean skin, oil tofu and so on.

Raw soybeans are almost indigestible and contain a special odor, so they must be heated before eating. When cooking soybeans, you should soak them in water for one night, then cook them with mushrooms and vegetables, and season them with sugar and soy sauce into sweet and salty Japanese dishes, or cook them into hot and sour soybeans with China flavor.

In recent years, it has been rumored that "eating beans will make uric acid is too high". According to the research in advanced countries, normal intake of beans will not cause gout. An American doctor from Croatia said at the Diabetes World Federation that it's good for orientals to eat soybeans, so they don't have to spend money on lecithin. Unfortunately, the Taiwan Province soybean system has declined under the strong promotion of western diet. Suitable for long-term consumption.

Soybean in the north and soybean in the south.