The Chinese have used the herbs in this delicious, mild-tasting tea for thousands of years to help maintain healthy blood pressure function and to tonify the kidneys and liver. These herbs are said to nourish the kidneys and liver, calm liver yang and clear heat. Eucommia is highly esteemed as a longevity herb. In modern times, it has been researched for helping to maintain healthy blood pressure function. Uncaria, Chinese holly, loranthus, chrysanthemum, and epimedium have a long history of use to tonify the kidney and liver. Fo-ti is a renowned longevity herb, used traditionally to help nourish the blood, build the system and tonify the kidney and liver. Regular tonification of the kidney and liver was believed to contribute to good health and longevity. It also was considered to help promote the healthy function of the back, bladder and joints