Yellow Dock (Rumex Crispus) is one of the best blood purifiers in the herb kingdom. It cleans the lymphatic system and tones the entire system. It has been used for: Amnesia, Boils, Cancer, Endurance, Gallbladder, Mental Fatigue, Rheumatism, Skin Problems, Liver, Congestion, Itching, Sores, Spleens and Swelling Ulcers.