Astra-8 (Si Jun Zi Tang) Defense Builder Herbal Formula is one of the most popular and effective herbal formulas available. It is the basis for many of the immune products found in natural food stores today. Astra 8 is the only one, however, recommended by name in books, on video, and in periodicals. According to Traditional Chinese Medicine (TCM), these herbs are especially used for people who worry, think too much, eat sweets and feel cold and tired. In TCM terms, these herbs tonify Lung, Spleen and Kidney Qi and strengthen Wei Qi. Western medicine considers many of these herbs adaptogenic in that they Enhance body adapt to stress. Astragalus, ligustrum, ginseng, and ganoderma (Reishi) found in Astra 8 are carefully balanced by additional herbs necessary to Enhance you digest and assimilate these proven tonic herbs. For additional defensive system toning and energy enhancement, use with Power Mushrooms.