Black beans as a kind of beans, is rich in protein, for the correction of hypoproteinemia caused by malnutrition have a very good corrective effect. Black into the kidneys proper intake of black beans, can play a role in strengthening the kidneys and nourishing the yin by supplementing the kidney meridian, there are certain benefits. The downside is that if you consume too much black beans, it will cause too much protein intake, increasing the burden of kidney metabolism, in the process also form a certain metabolite purine, for the formation of high uric acid caused by the disease may have adverse effects. So the benefits of black beans is to supplement protein and nourish the kidney meridian, the downside is that the excess protein intake causes a burden on the kidneys and purine accumulation, leading to a high incidence of some diseases.