In a study, researchers found that mushrooms have high amounts of the ergothioneine and glutathione, both important antioxidants, said the senior author. The researchers also found that the amounts the two compounds Ergothioneine Benefits for Longevity, Brain and Skin Health Ergothioneine: The Elusive Amino Acid reishi and roses Recent Strategies for the Biosynthesis of Ergothioneine Journal of Agricultural and Food Chemistry ERGO+ L Ergothioneine Marcus Institute of Integrative Health