Ergothioneine: The Elusive Amino Acid reishi and roses 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 Full article: Advances and prospects of ergothioneine in the treatment of cognitive frailty Antioxidant Compounds from Edible Mushrooms as Potential Candidates for Treating Age Related Neurodegenerative Diseases