Astragalus with chicken soup. [File photo]

Astragalus with chicken soup. The soup is quite nourishing in several ways. For one, the astragalus may dilate the blood vessels, and thus reduce blood pressure; for another, astragalus cooked with chicken may improve the immune system. The soup is good for the heart and it is especially suitable for those weak people, like the aged, women who just gave birth to babies, and those sweat easily.