Supporting Natural Immunity Cellular Support Made With U.S. Grown Organic Mushrooms Host Defense Turkey Tail uses activated freeze-dried, Certified Organic mycelium, with a full spectrum of constituents: polysaccharides (beta glucans, arabinoxlane, glucose, xylose, galactose and cordycepic acid), glycoproteins, ergosterols, triterpenoids and other myconutrients, which are essential for Supporting Natural Immunity. The Source Each mushroom species collected by Fungi Perfecti is sustainably harvested by taking a small sample of tissue with which to generate a master culture. The ecosystem remains intact and unharmed. We carefully culture the mycelium for the Host Defense products on the Fungi Perfecti Farm using the Stamets P Value system for quality assurance. This ensures the provenance and genetic vitality of each strain in the Hose Defense line. From the Forest, to our Farm, to You. Host Defense Turkey Tail Predominant in woodlands throughout the world, Turkey Tail is one of the best-documented mushrooms in medical 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.