Support overall health and well-being with Reishi Mushroom Extract. For more than 2,000 years, traditional Chinese herbalists have valued reishi as one of nature's premier tonic mushrooms for promoting health and wellness. We now know that reishi mushroom contains several beneficial constituents, including polysaccharides, sterols, triterpenoids and coumarin. Our Reishi Mushroom Extract is standardized to 10% polysaccharide concentration for guaranteed potency in each capsule.