Predominant in woodlands throughout the world, Turkey Tail is one of the best-documented mushrooms in scientific research. With a wide spectrum of beneficial properties, Turkey Tail shows much promise in supporting the immune system with its protein-bound and unique polysaccharides.* Host Defense® Turkey Tail uses activated, freeze-dried, Certified Organic mushroom mycelium, with a full spectrum of constituents: polysaccharides (beta glucans, arabinoxylane, fucose, glucose, xylose, galactose and mannose), glycoproteins, ergosterols, triterpenoids and other myco-nutrients, which are essential for Supporting Natural Immunity* and the natural microbiome. Turkey Tail (Trametes versicolor) is an excellent source of cellular nutrients* In a recent clinical study funded by the National Institutes of Health, Host Defense s Turkey Tail was shown to be immunologically active* MADE WITH U.S. GROWN ORGANIC MUSHROOMS