Anti-Viral, Immune Enhancer. Astragalus is a natural herbal remedy that has anti-bacterial and anti-inflammatory properties. It is considered a tonic herb for increasing immunity during body injuries, medical procedures, cancer treatment and infectious diseases such as colds, flu, viral infections, HIV infections and AIDS. I’ve listed simple ailments such as a cold, and very serious ailments, such as HIV, so you will realize how valuable this herb is. Astragalus root stimulates immunity and resistance to disease. It aids in healing by helping to speed tissue regeneration and the elimination of infectious material from the body. Astragalus is especially beneficial for the kidneys and adrenal glands. This herb will also increase your overall energy level. If fighting a viral infection, use in combination with other anti-viral herbs such as Echinacea, Pau D’Arco, and Goldenseal. Astragalus is also used topically for wounds.