Selenium, Blood Unit Converter

Selenium is an essential trace mineral that your body needs in small amounts. It is incorporated into over 25 selenoproteins, which carry out important biological functions throughout the body.

A selenium blood test measures the concentration of selenium in your serum, plasma, or whole blood. It is used to assess nutritional status and to detect deficiency or excess intake.

Selenium has a narrow therapeutic window, meaning the difference between a beneficial amount and a harmful amount is relatively small. This makes monitoring levels particularly important for anyone considering supplementation.

Selenium is obtained entirely from the diet. Rich sources include Brazil nuts, seafood, organ meats, poultry, eggs, and grains. The selenium content of plant foods varies widely depending on soil concentration in the region where they were grown.