Astragalus root (Astragalus membranaceus) is often used as an immune system tonic. What this means is that it helps to stimulate the immune system, and is able to be used on an ongoing basis. (Many herbs which stimulate the immune system can only be used for a limited period of time before they lose that effect or even have the reverse effect, but tonic herbs can be used continuously.) It also functions as an adaptogenic herbal tea, helping the body to deal with the physical effects of stress. It is often found in combinations that are intended to increase energy.

Astragalus has long been used as a Chinese remedy, and is a key herb in “FuZhen” therapy. FuZhen is concerned encouraging the body to use its natural healing abilities to maintain health and rejuvenate itself.

Astragalus provides the body with several isoflavone compounds, helps with production and secretion of interferon, works as an antiviral in the body, dilates coronary arteries, and has a diuretic effect.