You can utilize sliced Astragalus Root whole, cut and sifted or in a powder. A tea can be made from the dried Astragalus Root. When used appropriately, astragalus herb and extract appears to be safe and to have few side effects. However, as with any herbal supplement, always check with your health care provider before taking astragalus root. Pregnant or nursing women should not use astragalus root, as research has not verified its effects. *Organic Astragalus Root, Powder.