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You can obtain selenium through your diet by eating foods like Brazil nuts, bananas, and eggs. Some people with certain health conditions may have difficulty absorbing selenium.
Selenium (from Ancient Greek σελήνη (selḗnē) 'moon') was discovered in 1817 by Jöns Jacob Berzelius, who noted the similarity of the new element to the previously discovered tellurium (named for the Earth). Selenium is found in metal sulfide ores, where it substitutes for sulfur.
It is found naturally in foods or as a supplement. Selenium is an essential component of various enzymes and proteins, called selenoproteins, that help to make DNA and protect against cell damage and infections; these proteins are also involved in reproduction and the metabolism of thyroid hormones.
Selenium is a mineral found in the soil. It naturally appears in water and some foods. While people only need a very small amount, selenium plays a key role in their metabolism.
Selenium-rich foods include some nuts, fish, and poultry. Keep reading to learn more about selenium and why we need it, as well as 15 foods that contain this important nutrient. What is...
Selenium, a chemical element in the oxygen group (Group 16 [VIa] of the periodic table), closely allied in chemical and physical properties with the elements sulfur and tellurium. Selenium is rare, composing approximately 90 parts per billion of the crust of Earth.
Health Benefits. What Is Selenium? Selenium Needs. Food Sources. Safety. Selenium is a trace mineral that your body needs for various functions. It's found in soil, water, plants, and also dietary supplements. Selenium plays a vital role in thyroid, heart, and cognitive (brain) health.