Back and Knee Formula is also known as Du Huo Ji Sheng Tang. This is a classical formula used for pain in the lower body, especially in the low back, knees, legs and feet. Issues such as arthritis, weakness and heaviness of the legs, soreness, numbness and stiffness of the back or legs are all perfect candidates for this formula. The goal of this formula is to encourage the normal flow of qi and remove obstruction. In Western terminology it has been shown to inhibit inflammation by enhancing microphage activity and increasing blood circulation. Both of these activities are essential for healing inflamed tissues, restoring normal function and mitigating further degeneration. In Chinese medicine the kidney organ system keeps the bones of the back, legs and knees strong and healthy while the liver organ system nourishes the sinews, tendons and ligaments. The herbs in this formula have been used for centuries to strengthen strengthen the kidney and liver organ systems and nourish vital energy.