Black beans are rich in nutrients, and the protein content is higher than that of meat, eggs and milk, and other nutrients are also rich. Eating black beans often can soften blood vessels, moisten skin and delay aging, especially for hypertension, heart disease, liver and animal diseases. From the point of view of traditional Chinese medicine, eating black beans often can not only tonify kidney and qi, but also tonify kidney and yin. Black beans not only enter the kidney meridian, but also enter the spleen meridian, which has the function of invigorating spleen and benefiting qi. In addition, black beans also have the effect of removing water. For some people with edema and red face, eating black beans for a long time has a good diuretic effect. However, because black beans have the function of invigorating qi, people who are usually indigestible and prone to flatulence still eat less black beans or don't eat them. The nutrition of black soybean milk is more comprehensive than soybean milk, and its effects are mainly manifested in blackening hair, caring skin, nourishing liver and kidney, nourishing blood and promoting lactation.