Shiitake (Lentinus Edodes) and Maitake (Grifola Frondosa) mushrooms have been beneficial for centuries in traditional Asian medicine for general well-being. Many of the health benefits are attributed to the polysaccharide beta glucan which is found in both Shiitake and Maitake mushrooms. Nature's Way Shiitake and Maitake extract is formulated in a base of Oat powder standardized to a total of 8 % beta glucan. . .Other products from HerbsPro