Astragalus root provides quick energy, supports the immune system, helps digestive function, and is considered one of the most important longevity tonic herbs. Astragalus is a “qi” tonic according to Classical Chinese Medicine, as it directly supports the Lung and Spleen organs in the body. By supporting those organs, you derive and maximize energy from the foods you eat and the air you breathe. As an immune system tonic, Astragalus tonifies what the Chinese call "wei qi" or "protective qi" which is the energy that runs just below the surface of the skin. It helps the body fight off external pathogens that you may be exposed to. Astragalus also houses what is call "upright qi" which is the energy in the body that supports upright posture and the correct position of the organs.