Supports A Healthy Heart. Made With US Grown Organic Mushrooms. Host Defense Reishi uses activated freeze-dried Certified Organic mushroom mycelium with a full spectrum of constituents: polysaccharides (beta glucans arabinoxylane glucose xylose galactose and mannose) glycoproteins ergosterols triterpenoids and other myco-nutrients which are essential for Supporting Natural Immunity. The Source. Full Spectrum of Active Constituents. Grown & Processed in the USA. Purity Assured. Freeze Dried to Preserve Nutrients. Bioavailable Heat Activated. Optimized Peak Life Cycle Selection. P Value Certified for Maximum Growth. From the Forest to our Farm to You. Host Defense Reishi. This popular species used for more than two millennia is Asia has been respectfully called the "Mushroom of Immortality". Reishi grows throughout the world and is found primarily on hardwood trees. This mushroom is well known as a tonic for supporting general wellness and vitality.