Dragon Herbs obtains premium grade raw Astragalus roots organically grown in a remote, non-polluted rural valley in Northern China where it has been grown for at least 1500 years and is regarded as a premium Di Tao source of Astragalus root. In 1996, Ron and Yanlin Teeguarden went on a mission to China specifically to find the best Astragalus root China has to offer, and with the guidance of Professor Wang Zhengtao (Editor in Chief of the Chinese Pharmacopeia), found it. Dragon Herbs Astragalus extract contains a full range of Astragalus saponins (astragalosides) and polysaccharides, as well as all the other constituents of Astragalus root.