Black beans are black in color and morphologically somewhat resemble the kidneys, which Chinese medicine uses to take analogies that are believed to nourish the kidneys. But things to think about carefully, some patients with kidney disease actually can not eat black beans. Because black beans are vegetable proteins and hard to digest, after too much consumption, it will significantly increase the metabolic burden on the kidneys. Therefore, patients with kidney disease, such as nephropathy, uremia, nephritis patients pay attention to eat as little as possible, it is damaging, increasing the burden on the kidneys, is something that is scientifically argued. Not black, like the kidney look like will definitely supplement the kidney, the specific composition of whether to increase metabolism, are to take some scientific data to explore, can not say like what to supplement what, not every thing must follow this law.