Black bean is the black seed of soybean (scientific name: glycine max (L.) Merr). The protein content of black beans is 36%, which is easy to digest, and it is of great significance to meet the demand of human body for protein. The fat content is 16%, mainly containing unsaturated fatty acids, and the absorption rate is as high as 95%, which not only meets the human body's demand for fat, but also has the function of lowering blood cholesterol; Black beans are rich in vitamins, egg yolk, melanin and lecithin.

Among them, B vitamins and vitamin E are high in content, and they have nutrition and health care functions. Black beans are also rich in trace elements, which is very important to keep the body functional integrity, delay the aging of the body, reduce blood viscosity and meet the brain's demand for trace elements.