Yellow Dock contains chlorophyll, vitamin A and C, oxalic acid, tannins, calcium, iron, magnesium, phosphorus, tonic and is a very bitter herb.
 
Yellow dock has been used to cleanse the circulatory system, liver, spleen, kidneys, and bladder. Yellow dock has also been used to treat many illnesses such as anthrax, anorexia, cancer, chronic fatigue syndrome, common cold, cramps, depression, fever, general weakness or loss of strength, headaches, hepatitis, high cholesterol, leprosy, malaria, menopause, mental stupor, mouth sores, oral hygiene, ring worm, and tuberculosis.