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| SelenoSource™AF | |
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All-Natural, High-Selenium Yeast |
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| Introduction
Dairy
Cattle
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SelenoSource AF is a premium source of organic selenium (Selenomethionine) backed by more than 60 years of integrity in the feed business and in manufacturing of high quality yeast products. Organic selenium is more biologically available than sodium selenite or sodium selenate, the two inorganic forms of selenium commonly used in the feed industry today. Selenium is an essential trace mineral and is necessary for normal health and productivity in animals. When fed in excess, selenium is toxic to tissue cells and becomes an environmental contaminant through fecal excretion. Therefore, the maximum levels for feeding selenium feeding to various livestock are regulated by regulatory bodies around the world. Why is Organic Selenium important? The addition of supplemental selenium from both inorganic and organic sources is aimed at overcoming selenium deficiencies. After selenium was discovered to be an essential nutrient for livestock, inorganic sources of selenium were widely used to overcome deficiencies. Little realization was made of the fact that inorganic selenium was not in the natural form that animals can fully metabolize and is therefore poorly absorbed and retained. Consequently, selenium deficiencies still arise even at the maximum allowable selenium feeding levels. Organic selenium is derived from yeast, a single-cell fungi which is capable of utilizing elemental selenium (instead of sulfur) to synthesize selenomethionine in place of methionine. Hence, organic selenium products should be viewed as sources of selenomethionine. The selenomethionine form of selenium is natural and rapidly metabolized within the body to yield high bioavailability and retention. In comparison, sodium selenite is pro-oxidative and cannot be converted to a storable form in the body. Further, organic selenium sources also reduce the threat of soil and water contamination through fecal excretion. As organic sources are more readily absorbed they are in turn more readily metabolized to support selenium dependent body functions while reducing the threat of selenium toxicity. |
