Selenium 1 article

Because plant-food selenium can reflect local soil content, the nutrient is less predictable from food name alone than many macronutrients; labels and supplement forms provide a more direct basis for product comparison. Selenium is an essential trace element incorporated into selenoproteins and found in foods at levels that can vary with growing conditions. Brazil nuts, seafood, meat, and eggs are recognized sources, while supplements may use forms such as selenomethionine or sodium selenite.