Japanese Knotweed root supports the immune system and the nervous system. Research shows that the root of this plant may contain properties that benefit a healthy cardiovascular system, including support to the physical tissues of this beautiful, heart-centered system. This herb has been found to enhance blood flow, especially to the eye, heart, skin, and joints. These benefits make it especially helpful for Lyme disease patients as it facilitates blood flow in hard-to-reach areas to kill the spirochetes.