The astragalus belongs to a very large family of shrubs and herbs that has over 2,000 different species. It is known in China as huang qi(yellow energy). The astragalus has a long history in herbal medicine. Historically, astragalus herb has been used in traditional Chinese medicine, usually in combination with other herbs to support and strengthen the immune system. The root is a useful part of the plant. The astragalus is now used for reinforcing the immune system. In clinical studies which were done on people who have frequent colds, it was observed a clear improvement in the treatment of symptoms. The beneficial effect of the astragalus is connected to the high content of polysaccharides. The herb is considered to be ideal for use by people who feel weakness, fatigue and colds. It is often used with ginseng as a stimulant of the organism.