Astragalus helps support liver health, nourish the body's defenses and boost energy. Swanson Astragalus provides 500 mg of astragalus root extract per capsule standardized to 0.5% calycosin 7-O-β D-glucopryanoside, a beneficial antioxidant isoflavone. Astragalus has a long history of traditional use in Eastern health practices as an invigorating tonic and stress-busting adaptogen. Support multiple facets of total body health with Swanson Standardized Astragalus.