For More Than 2000 Years Chinese Herbalists Have Valued Astragalus For Its Adaptogenic Properties As Well As For Its Ability To Tonify The Body's "Vital Force" Known As The Qi.* More Recently Astragulus Has Been Found To Support Healthy Immune Function Through Numerous Mechanisms.* Non-Clinical Studies Using Astragalus Have Demonstrated It Can Support The Healthy Production Of And Activity Of Specialized White Blood Cells.* Astragalus Has Also Been Studied For Its Role In The Support Of Healthy Liver And Vascular Function.*