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 Ergo What? 10 Facts About the New Super Vitamin Real Mushrooms The nutritional benefit of mushrooms is remarkable. For centuries, mushrooms have been legendary for their nutritional value. But it's only been recently that mushrooms have been studied and their true power revealed. L Ergothioneine: A Potential Bioactive Compound from Edible Mushrooms Springer Nature Link