Yellowdock Root (Rumex crispus) is an excellent blood cleanser, tonic and builder. Purifying the blood and lymph system. It has one of the highest iron contents in nature and is an effective tonic for anemia during pregnancy and in general. It is used treat skin diseases (including psoriasis, herpes, eczema and acne), liver disorders and iron deficency. Externally it can be applied to bleeding hemorrhoids and wounds.