Black beans and soybeans are close relatives, all belong to the soybean family, just varieties of differences, nutrient composition is similar. Thus, black soybean milk and soybean milk are rich in protein, potassium, magnesium, calcium, B vitamins and other nutrients, as well as soluble dietary fiber and isoflavones health care substances. The difference is that soybean milk contains a small amount of carotenoids, while black soybean milk contains chlorophyll and melanin, all of which are beneficial to health. Black soybeans have slightly higher protein, potassium and vitamin content than soybeans, and clear fire, water, antioxidant and other aspects of the role of the stronger, so it is better to drink black soybean milk