First, the beans are different in color

1, soybeans: mostly yellow, but also light green, brown and black.

2. Green beans: there are green-skinned green-kernel soybeans and green-skinned Ren Huang soybeans.

3. Black beans: The surface is black-red or purple-red.

4, kidney beans: there are red, white, yellow, black and striped colors.

Second, the nutritional components are different

1, soybean: comprehensive nutrition, rich in content, of which the content of protein is 2 times higher than that of pork and 2.5 times that of eggs. The content of protein is not only high, but also of good quality. The amino acid composition of soybean protein is similar to that of animal protein, in which the ratio of amino acids is close to that needed by human body, so it is easy to be digested and absorbed.

2. Green beans: Green beans are rich in saponins, protease inhibitors, isoflavones, molybdenum, selenium and other anticancer components, which have inhibitory effects on almost all cancers such as prostate cancer, skin cancer, intestinal cancer and esophageal cancer.

3, black beans: black beans also contain a variety of trace elements, vitamins and cardiac glycosides, soybean saponins and other functional factors.

4. Kidney beans: Kidney beans are rich in nutrients, including protein, fat, carbohydrates, dietary fiber, vitamin A, carotene, thiamine, riboflavin, niacin, vitamin C, vitamin E, calcium, phosphorus and sodium.

Third, the distribution is different

1, Soybean: Soybean originated in China. It is cultivated all over China, among which Heilongjiang soybean is the most famous and widely cultivated all over the world.

2. Green beans: China green beans are mainly concentrated in the Northeast Plain, Huanghuai Plain, Yangtze River Delta and Jianghan Plain.

3. Black beans: Black beans are produced all over China.

4. Kidney bean: originally from Mexico and Argentina in America, it was introduced and cultivated in China at the end of16th century.

Baidu Encyclopedia-Soybean

Baidu encyclopedia-green beans

Baidu encyclopedia-black beans

Baidu encyclopedia-kidney beans