1, the difference in appearance: green heart black beans are divided into two kinds of large black beans and small black beans, the general shape of the beans are round, and not very uniform. Yellow heart black beans only small grain varieties, the shape is flat, slightly oval.

2, the difference between the role of nourishment: green heart black beans are improved varieties, the role of nourishment is slightly weaker. Yellow heart black beans are old varieties, their role in tonic stronger.

3, the role of different: yellow heart black beans are mainly used for food, and green heart black beans are mainly used for medicinal purposes.

Black beans are the black seeds of the legume soybean. Black bean protein content of 36%, easy to digest, to meet the body's need for protein is important; fat content of 16%, mainly containing unsaturated fatty acids, absorption rate of up to 95%, in addition to meet the human body on the need for fat, but also to reduce the role of cholesterol in the blood; black beans are rich in vitamins, lutein, melanin and lecithin and other substances, which is a very high content of B vitamins and vitamin E, with nutritional health effects. High, with nutritional health effects, black beans are also rich in trace elements, to maintain the functional integrity of the body, slow down the aging of the body, reduce blood viscosity, to meet the brain on the demand for trace substances are essential.