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A tonic and immune-enhancing herb that is supposed to increase natural killer (NK) cell activity. This type of plant has been used in China for nearly 4000 years for chronic hepatitis and as an adjunct in cancer therapy.
It is used by those with AIDS today. The root of the plant is used in soups, teas, extracts, and capsules. The herb is presently being studied by the NCCIH. Preliminary studies indicated some effectiveness for boosting the immune system, benefits for the heart and liver, and as a useful adjunct for cancer therapy.
While there's no official recommendation for the most effective astragalus dosage, 9 to 30 grams per day is a typical dose. However, you should consult a doctor if you're looking to use astragalus to supplement treatment for a medical condition, as some doses may be more effective than others.