Black beans are flat and sweet. Has the effects of regulating middle qi and lower qi, nourishing yin and tonifying kidney, enriching blood, improving eyesight, promoting diuresis, relieving swelling, promoting blood circulation and caring skin.

Black beans have high nutritional value. Black beans are rich in high-quality protein, fat and carbohydrates. In addition, they also contain more minerals such as calcium, phosphorus and iron, carotene, vitamins B 1, B2, B 12 and other nutrients needed by human body. The nutritional components of black beans are similar to those of soybeans, but the protein content of black beans is higher than that of soybeans, second only to soybeans.

Black beans can be boiled, fried, made into tofu, raw bean sprouts, or made into black bean powder. Eating black beans often has a good nourishing effect on the weak after illness.

Black beans enter the kidney meridian, which has the functions of nourishing kidney and tonifying kidney, enriching blood and improving eyesight. Regular consumption of black beans has a good preventive and therapeutic effect on kidney deficiency, low back pain and knee weakness, body edema, rheumatic joint pain, carbuncle swelling and soreness. Li Shizhen said in Compendium of Materia Medica: "If you eat black beans for a long time, the color will be good, but it will never get old." It can be seen that black beans also have the effects of growing skin, benefiting qi, and strengthening the body and prolonging life. Long-term consumption can make muscles thin and skin white.