Reishi mushroom is one of the most highly prized botanicals of Chinese herbalism. Traditionally it was used as a general tonifier for preserving health and promoting longevity, as well as for promoting mental well-being. Modern pharmacological research has identified more than 100 oxygenated lanostane triterpenes in the reishi mushroom fruiting body and the mycelium. Many of these compounds are known for their ability to support immune defenses. Planetary Herbals Full Spectrum Reishi Mushroom combines a highly concentrated extract of the mature fruiting body with the mycelia biomass, to ensure that every bit of reishi activity is present, and easily assimilable.