Predominant in woodlands throughout the world, Turkey Tail (Trametes versicolor) 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 Capsules use activated, freeze-dried, Certified Organic mushroom mycelium, with a full spectrum of constituents: polysaccharides (beta glucans, arabinoxylane, fucose, glucose, galactose and mannose), glycoproteins, ergosterols, triterpenoids and other myco-nutrients, which are essential for supporting natural immunity and the microbiome.