Full Spectrum Astragalus glycerine extract is prepared from the same premium grade astragalus as the Planetary Herbals alcohol extract. In order to capture the full range of constituents, the herb is first extracted in alcohol. The alcohol is then slowly evaporated off at a low temperature and reconstituted with pure vegetable glycerine. Glycerine extracts such as these are ideally suited for children or those wishing to avoid alcohol