Black beans, flat in nature, sweet in flavor. It has the function of regulating the middle and lowering the qi, nourishing yin and tonifying the kidney, tonifying the blood and brightening the eyes, inducing diuresis and eliminating swelling, and invigorating the blood and beautifying the skin.

The nutritional value of black beans is very high, black beans are rich in high-quality protein and fat and carbohydrates, in addition, also contains more calcium, phosphorus, iron and other minerals and carotene as well as a variety of vitamins B1, B2, B12, and other nutrients that the human body needs. The nutritional composition of black beans and soybeans are not similar, while the protein contained is higher than soybeans, is second only to soybeans beans.

Black beans can be boiled, can be fried, can make tofu, raw bean sprouts, can also be made into black bean powder to eat. Eating black beans, on the sick and weak have good nourishing effect.

Black beans into the kidney meridian, with nourishing the kidney, kidney, blood and eyesight function. Regular consumption of black beans, kidney weakness, lumbago, knee weakness, swelling, rheumatism and paralysis, joints are not favorable, canker sores and other diseases have a good prevention and treatment. Li Shizhen in the "Compendium of Materia Medica" said: "long time to eat black beans, good color, white not old." It can be seen that black beans have long skin, good color, health and longevity of the effects of eating for a long time can make the muscle fine skin white.