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.* Natural color variation may occur in this product.