Comparing ORGANIC SELENIUM sources

wide range of products is available; from inorganic, sodium selenite or selenate coated or not, even nanoparticles to organic forms such as selenized yeasts, chelates of selenium methionine (SeMet), pure forms of SeMet or hydroxy-selenomethionine, and some complexes sources of Se based on mixing mineral Se with glycinates, proteinates, etc. It has been confirmed that, comparing with mineral selenium, its organic forms are better absorbed thus serve selenium needs more efficiently. Research has revealed that selenium incorporated as selenocysteine (SeCys) is the key amino acid supporting the antioxidant properties of most of the 25 selenoproteins identified in animal species or humans such as glutathione peroxidase, thioredoxine reductase and methionine sulfoxide reductase. However, this SeCys has to be synthetized de novo by the cells and cannot be supplied through feeds. Dietary SeCys undergoes complete transformation to selenide Pierre-André Geraert Mickaël Briens Yves Mercier Y.G. Liu Comparing ORGANIC SELENIUM sources