Liquid Herbal Extract Astragalus Membranaceus (Huang Qi) Supports Healthy Function of the Immune System Herbal Dietary SupplementWe prepare our Astragalus Extract form the roots of Astragalus membranaceus plants which are Certified Organically Grown without the use of chemical fertilizers, pesticides or herbicides. To assure optimal extraction of Astragalus bioactive compounds, the roots are hand-harvested only in late autumn, are carefully shade-dried to maintain their full aroma and color, and are then thoroughly extracted. Our Astragalus is never fumigated or irradiated.Dry herb/ menstruum ratio: 1 : 5