New Roots Herbal Astragalus Immune - A complex combination of polysaccharides, triterpene glycosides, flavonoids, amino acids, and trace minerals. Astragalus extract appears to restore T-cell (a specific type of white blood cell) counts to relatively normal ranges in some cancer patients. Astragalus polysaccharides have been shown to stimulate pituitary-adrenal cortical activity and restore depleted red blood cell formation in bone marrow.