in thyroid gland in Hashimoto's disease. However, in a case of combined iodine and selenium deficiency, selenium deficiency was shown to play a thyroid-protecting role. See also Abundance of elements in Earth's crust ACES (nutritional supplement) Selenium yeast Notes References External links Selenium at The Periodic Table of Videos (University of Nottingham) National Institutes of Health page on Selenium Assay ATSDR – Toxicological Profile: Selenium CDC – NIOSH Pocket Guide to Chemical Hazards Peter van der Krogt elements site Chemical elements Chalcogens Reactive nonmetals Polyatomic nonmetals Antioxidants Dietary minerals Native element minerals Chemical elements with trigonal structure Crystals in space group 152 or 154 Crystals in space group 14 Selene