Black bean is a kind of leguminous plants, also known as black soybean, black bean, winter soybean, twig bean, cowpea and so on. This leguminous food originated in the northeast of China, and its key growth and development are in the colder regions, and it is cultivated in the northern regions. Black beans are also a crop that we often eat. It is rich in nutrition and has high utilization value. It is not only often made into bean food, but also an important food crop. Douchi and soybean paste are made of black beans. Black beans often produce a pot of gray-black slurry during the whole cooking process. Many people often feel sick and want to vomit, but this pot of gray-black water just has the effect of warming and nourishing the spleen and kidney. "Compendium of Materia Medica" says: "Soybeans are black, white, yellow, brown and blue. Black can be used as medicine, black beans can be used as medicine, yellow can be rotten, oil can be squeezed to make sauce, and others can be rotten and fried. " Black beans also belong to the family Papilionaceae, which is an annual woody plant with underground stems with yellow fluff, oval leaves and lavender or milky white flowers, usually two or ten. The leaves, flowers and seed coats of black beans have medicinal value.

Black beans and black beans are flat and sweet, and they also belong to nourishing appliances that can be taken for a long time, belonging to the spleen and kidney meridians; Has the effects of relieving swelling, warming yang, moistening lung, relieving cough, moistening dryness and blackening hair, and prolonging life. Many people know that eating black beans will give birth to height. It is not difficult to see that the strong human body and nourishing blood gas of black beans have already won the hearts of thousands of families and passed down from generation to generation. Gray-black belongs to water, so black beans belong to kidney valley in five kinds of bean foods, which can nourish kidney qi. The growth and development of bone tendons in the whole body is directly related to the function of kidney, and also has the function of strengthening tendons and strengthening bones. People with kidney deficiency can take black beans to help urine and dispel wind, which can alleviate the symptoms of backache and the smell of women's leucorrhea. Black beans have a very good effect on juvenile baldness. If night sweats caused by kidney deficiency are difficult to heal, black beans with a period of one month also have practical effects.