Selsaf 3000 is a highly bio-available source of selenium, developed by Phileo by Lesaffre. It has been made with a specific strain of Saccharomyces cerevisiae in an environment enriched with sodium selenite. This generates the release of both main selenium’s active principals: selenocysteine and selenomethionine, that generate an antioxidant function and improve the quality of the muscle tissue of the animal.