Iodine.
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D002418:Cattle Diseases; D003677:Deficiency Diseases / Q000150:complications / Q000662:veterinary; D006042:Goiter / Q000209:etiology / Q000662:veterinary; D007455:Iodine / Q000378:metabolism*; D009751:Nutritional Requirements
D007455:Iodine