The yellow dock root is yellowish-brown in color, which is where it gets the name yellow dock. The roots are a thick and fleshy mask that are about 10-12'' long and 0.7'' thick. This root contains several mineral nutrients which include tannins, rumoquin, oxalates, glycosides, and anthraquinone. The dock root is usually consumed in the form of capsules, tea, and as a dried herb.