Swanson Astragalus Root, Immune Support, 470 mg, 100 Capsules

Our verdict

Swanson Astragalus Root, Immune Support, 470 mg, 100 Capsules works out to $0.11 per serving of astragalus, at 470mg per serving in capsule form. That puts it below the median of the 16 astragalus products we can price per dose, where the typical serving costs $0.16, a Value Index of 1.4 where the median product is 1.0. One container lasts 100 days at the label dose of 1 serving a day, about $3.33 a month. We could not verify a third-party certification for Swanson in a public registry. Worked out from the current retail price as of 2026-11-13; confirm the live price on Amazon.com before buying.