The Relative Bioavailability of Sodium Selenite and High Selenium Yeast in Human

The yeast was more highly absorbed, peaked at a later time and remained in the blood for a longer period of time than the selenite. These results are in agreement with our long term animal supplementation study in which we found a greater blood selenium concentration after feeding rats yeast as compared with selenite. The urine results also corroborated the blood in that the yeast selenium was less excreted, i.e. more retained than the selenite.