Chaga, or chaga mushroom (Inonotus obliquus), is a fungus that grows primarily on birch trunks and has been present in traditional herbal systems for centuries. Chaga fruiting bodies are characterized by a hard, irregular structure and a naturally high content of polysaccharides, including beta-glucans. Osavi Chaga 1000 mg supplement contains standardized chaga fruiting body extract in convenient capsules