Maitake (Grifola frondosa) is the legendary Asian mushroom, revered for both its delicious taste and health-promoting benefits. Maitake is a rich source of beta-glucan, a long chain polysaccharide known for its ability to support immune defenses. Unlike most other maitake products, Full Spectrum Maitake Mushroom includes both the fruiting body and the mycelium to provide a broad range of maitake activity.