The blending of traditional wisdom and modern science has created lentinus edodes mycelia extract (LEM™)- one of the most potent and biologically available forms of shiitake available anywhere!. Planetary Herbals Full Spectrum™ Shiitake Mushroom combines LEM™ with shiitake mycelium biomass and an extract of the mature fruiting body. The result is a special nutrient-rich and highly assimilable form of shiitake that captures the full range of unique compounds in this valued mushroom.