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Selenium is a nutrient that the body needs to stay healthy. Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection.elenium is a nutrient that the body needs to stay healthy. Selenium is important for reproduction, thyroid gland function, DNA production, and protecting the body from damage caused by free radicals and from infection.
Most beef producers know that selenium is important for beef cattle, but quite often they are unsure as to how much selenium is needed or what form to provide. Selenium (Se) is an essential trace mineral for cattle. It is involved in proper immune function, acts as an antioxidant, and helps activate thyroid hormones.