Nature’s Way Astragalus Standardized Description: Astragalus extract is standardized to 0.5% astragalosides, one of the most studied components. It ranks as one of China’s most important herbal medicines and is commonly used in Chinese cuisine. Astragalus has been used in Chinese medicine for centuries for its immune support and normalizing effect on body function. Early Chinese writings refer to Astragalus as “”the superior Tonic.”” Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.