Astragalus comes from the root of the Astragalus membranaceus plant. Herbal traditions use this root to support immune health and to sustain normal energy levels. Some turn to it as an adaptogen, helping the body cope with daily stress. It comes in capsules, extracts, teas, and powders, typically taken with meals.
Pregnant or breastfeeding women should avoid it because safety data is lacking. Caution is needed if you take drugs for diabetes, blood pressure, or immune suppression. Astragalus might also influence blood clotting, so stop taking it before any scheduled surgery.