Mushrooms (especially porcini) contain the highest levels of 2 powerful antioxidants, ergothioneine and glutathione, the latter of which is sometimes called the mother of all antioxidants and is a very important bodily A Mushroom Derived Compound That Could Change Your Life: Ergothioneine Frontiers Mushroom marvels: understanding their role in human health Ergothioneine as a promising natural antioxidant: bioactivities, therapeutic potential, and industrial applications Food & Function (RSC Publishing) DOI:10.1039 D5FO02337H 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.