For natural immune system support turn to one of earth s best-documented and researched mushrooms. Host Defense Turkey Tail is a daily superfood supplement made to support natural immunity and detoxification. We use activated freeze-dried mycelium rich in protein bound polysaccharides (beta glucans arabinoxylane fucose glucose xylose galactose and mannose) glycoproteins ergosterols triterpenoids and other myco-nutrients.