Now Supplements, Astragalus (Astragalus Membranaceus) 500 mg, Immune System Support*, 100 Capsules E-Retailer Product Description Astragalus Root (Huang Qi) Has Been Used As A Popular Herbal Tonic In China For Many Centuries. Some Of The Known Active Components Include Flavonoids, Free Amino Acids, Trace Minerals And Polyphenols. Natural Color Variation May Occur In This Product. Immune System Support*: Now® Astragalus Is An Adaptogenic Herb* And Known Active Components Include Flavonoids, Free Amino Acids, Trace Minerals, And Polyphenols. History: Astragalus Root (Huang Qi) Has Been Used As A Popular Herbal Tonic In China For Many Centuries. Classifications/Certifications: Non-GMO, Quality Gmp Assured,...