Standardized to 70% Polysaccharides Supports Healthy Immune Cell Function* For more than 2000 years, Chinese herbalists have valued astragalus for its adaptogenic properties, as well as for its ability to tonify the body's "vital force" known as the Qi.*  More recently, astragalus has been found to support healthy immune function through numerous mechanisms.* Non-clinical studies using astragalus have demonstrated it can support the healthy production of and activity of specialized white blood cells.* Astragalus has also been studied for its role in the support of healthy liver and vascular function.* Natural color variation may occur in this product.