OverviewBack to top Solgar - Selenium 200 mcg. - 50 Tablets Item# :66988UPC# :033984025400 Brand:Solgar Size/Form:50 Tablets Servings:50 Dosage:1 Tablet(s) Sugar, Salt, and Starch FreeSuitable for Vegetarians Selenium is a trace Mineral essential for good health. Selenium is a product that helps regulate thyroid functions and plays a role in fighting the immune system. Brazil nuts are the best source of selenium. Yeast, whole grains, and seafood are also good sources. Animal studies have found that selenium from yeast is better absorbed than selenium in the form of selenite.Selenium is used to help lower cholesterol levels as well as be used to help improve the immune system.