Description 4oz of Burdock Root WHAT IS BURDOCK? Burdock is a plant. The root is sometimes used as food. The root, leaf, and seed are used to make medicine. People take burdock to increase urine flow, kill germs, reduce fever, and “purify” their blood. It is also used to treat colds, cancer, anorexia nervosa, gastrointestinal (GI) complaints...