When you think of purifiers, look no further than burdock root.  Burdock is one of my favorite root herbs.  The main benefit with this root is its ability to purify the blood which also means the liver and gallbladder are getting a good scrub down.  When these organs get cleaned up and working properly your body begins to rid itself of built-up uric acid, glands being cleansed, and stimulated digestion for intestinal health.  When your gut is in good working order so is the overall body.