Burdock root is rich in dietary fiber, dietary fiber has the effect of absorbing sodium, and can be discharged with feces, so that the content of sodium in the body is reduced, so as to achieve the purpose of lowering blood pressure. The content of calcium in the root of burdock is the highest among the root vegetables. Calcium has the effect of introducing sodium into urine and discharging it out of the body, thus achieving the purpose of lowering blood pressure.