Selenium is a key component of a number of functional selenoproteins required for normal health. The best know of these are the antioxidant glutathione peroxidase enzymes. Selenium plays an important role in the control of thyroid hormone metabolism and is important for proper reproductive performance.
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- WHAT IT TESTS: Measures selenium levels.
- WHY TAKE IT: Monitor thyroid hormone metabolism and reproductive performance.
- REQUIRES FAST? No.