Yellow dock (Rumex crispus) is leafy-green plant distinguished by its yellow carrot-shaped root. In herbal medicine, it has a long history of use as a detoxifying herb, as well as to support the skin and liver; for those purposes it is often combined with dandelion root. A mild laxative, it contains anthraquinone glycosides, the active ingredients also found in senna leaf. A rich source of iron, yellow dock root has been traditionally used to supply iron to the diet.