Tang Dynasty's "Materia Medica" book inside said, black beans can "bright eyes and heart, warm. Served for a long time, good color, white not old". In addition, in the "Compendium of Materia Medica" book, is a list of examples of eating black beans, such as "Li Shouyu every morning water swallowing black beans two or seven to the old age," "Tao Hua to black beans boiled in salt, often eaten, Yuan can tonify the kidneys," and so on. In Chinese medicine, "bean is the valley of the kidney", and according to the theory of Chinese medicine five colors into the five organs, black into the kidney, so often eat black beans, the effect of the kidney will naturally be better. We often say that the kidney is the main bone, and "the tooth is the rest of the bone".
Black beans can generally be divided into ubiquitous green beans and ubiquitous yellow beans.
The skin of the green beans is black, and the flesh is green and named. This species so valuable, mainly protein, vitamins, iron and other content is extremely rich, high medicinal value, in Chinese medicine belongs to the tonic good. According to the Chinese medicine theory, it has nourishing yin and tonifying gas, nourishing and bright eyes, eliminating wind and preventing heat, blood detoxification, as well as hair and other medicinal uses. It can be taken internally or used externally, and is effective when eaten alone, but even more so when used in conjunction with other medicines. The "Compendium of Materia Medica" in the only use of the bean as a single prescription for the treatment of disease up to 59 prescriptions.
The scope of treatment involves internal medicine, gynecology, surgery, ophthalmology, as well as drug poisoning, etc., a wide range of uses, usually as a cool tonic strong medicine to apply. The green beans have this function, in the international market is listed as a material in short supply, best-selling in Hong Kong, Southeast Asia, Japan and South America, Northern Europe and other countries and regions. Ubiquitous yellow kernel bean is a variety introduced from Japan, high nutrient content, is the production of candied fruit excellent material, loved by the Japanese.