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NOW® Beta-1,3/1,6-D-Glucan (Beta-Glucan) is a bioactive carbohydrate derived from the cell wall of Saccharomyces cerevisiae, commonly known as Bakers' yeast.* Scientific studies have shown that yeast-derived Beta-Glucan can interact with certain immune cells, including those present in the gut-associated lymphoid tissue (GALT).* The GALT exists in the intestinal tract and is known to play a critical role in healthy immune system function.* NOW® Beta-Glucan is blended with Maitake Mushrooms for complementary support.*