Recommended Astragalus Dosage
In some clinical studies, astragalus was administered in high dosages and by injection. Recent advances in injectable gels containing astragalus promise to make astragalus injections a viable long-term therapy option. Fortunately, people don't have to wait on easy-to-use astragalus injections to take advantage of some benefits. 76
For example, you can use it at home brewed as a tea or even added to chicken soup! Experts recommend 8-12 grams/day of the dried root, which you can steep in boiling water or broth for up to 30 minutes. Use half of the steeped liquid twice a day, preferably on an empty stomach. 8, 55
If tea or soup doesn't appeal to you, astragalus can be found in supplement form. Some suggest only up to 500 mg/day; but PhDs in pharmacy recommend 2-30 g/day of dried root supplement or 4.5-8.5 mL/day of liquid astragalus extract. 55
Practitioners of traditional Chinese medicine suggest taking astragalus as a preventive, not curative, measure against colds and flu, since it may actually hasten the worst symptoms if taken after you are already sick. 8