Selenium is a metallic element that is essential in trace quantities for the proper functioning of many aspects of the biochemistry of your body. Principally, it is an essential component of the two enzymes glutathione peroxidase and thioredoxin reductase, both important antioxidants, and of the diodinase enzymes that are essential components of thyroid activity. Because of these two sets of enzymes, selenium is very important to the health of most animals.
Although selenium deficiency is not common, it can occur in those suffering severe intestinal problems, and it is postulated that those eating food grown in soil low in selenium should also be at risk of a deficiency as are those undergoing long periods of intravenous feeding. Deficiency can compromise the immune system through a lack of reduction of highly oxygenated species and free radicals, and studies have indicated a correlation between selenium deficient soils and incidences of HIV/AIDS. There appears to be a similar link involving cancer and a deficiency of selenium, although more work is required to confirm this.
Selenium is available in a wide array of potencies as well as in capsule and tablet forms at your local or internet health food store. Look for name brands like Solaray and Kal to ensure potency and quality.
*Statements contained herein have not been evaluated by the Food and Drug Administration. selenium is not intended to diagnose, treat and cure or prevent disease. Always consult with your professional health care provider before changing any medication or adding Vitamins to medications.