Black beans are rich in nutrients, including protein 36. 1g, fat 15.9g, dietary fiber 10.2g, carbohydrate 23.3g, calcium 224mg, magnesium 243mg, potassium 1377mg and phosphorus 500mg, which are essential vitamin B for human body. Black beans are the most abundant health products in plants. It is very important for delaying human aging and reducing blood viscosity.