Selenium is an essential trace element that functions within selenoproteins, some of which are enzymes with important antioxidant functions.
Glutathione peroxidases, that provide cellular antioxidant defence, and iodothyronine deiodinases that regulate thyroid hormone metabolism to provide hormonal homeostasis in response to variations in iodine intake, are both selenoprotein enzymes. Selenoproteins are also implicated in cell proliferation and survival, redox homeostasis, and the immune response.
The full entry for selenium is undergoing validation and will be added to OpeN-Global soon.
For any questions meanwhile, please firstname.lastname@example.org
US National Academies Press: Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium and Carotenoids:
US National Institutes of Health Office of Dietary Supplements: Fact sheet for health professionals, selenium