Astragalus is used to protect and support the immune system, preventing colds and upper respiratory infections, lowering blood pressure, treating diabetes, and protecting the liver. Astragalus has antibacterial and anti-inflammatory properties.
Astragalus is also called huang qi or milk vetch. It comes from a type of bean or legume. While there are multiple species of astragalus, most astragalus supplements contain Astragalus membranaceus. The herb is said to offer multiple health benefits for multiple conditions, including heart benefits.

Astragalus is thought to stimulate the immune system. It has antioxidant effects that inhibit free radical production. In the body, free radicals damage cells and are linked to many health problems associated with aging.