Nature's Way standardized Reishi Mushroom is a scientifically and technically advanced herbal extract collected from the whole fruiting body and standardized to 10% polysaccharides. Reishi is a traditional tonic mushroom for well being. It has been a folk remedy in China for thousands of years and was considered an Elixir of Life. Reishi (Gonaderma lucidum) is a mushroom traditionally used to increase longevity and well-being and is also suggested to enhance immune response, balance blood sugar, inhibit tumors, enhance cardiovascular health, balance cholesterol levels, tone kidneys and liver, reduce stress, provide antioxidant protection and may be beneficial in the treatment of HIV, AIDS, hepatitis, nephritis, arthritis, bronchitis, asthma, ulcers, insomnia, allergies, tumors, high blood pressure, and bone marrow disorders.