Ergothioneine levels predicted better memory in more than 1,000 older adults, linking a mushroom-derived antioxidant to cognitive health and widespread dietary shortfall

Ergothioneine, a dietary antioxidant concentrated in mushrooms, was associated with better memory performance in a study of more than 1,000 older adults. Lower levels were common, suggesting that many people may not be getting enough of a compound tied to cognitive resilience and healthy aging. The findings center on an observational link rather than proof of causation, but they add to growing interest in mushroom-derived compounds beyond classic psychedelics. Researchers connect ergothioneine to reduced oxidative stress and inflammation, two processes often implicated in age-related cognitive decline. Mushrooms stand out as a primary food source, which gives the result public health relevance: diet may shape exposure to a potentially protective nutrient that remains underconsumed in many populations. The broader implication is that everyday fungal compounds could matter for brain health even outside therapeutic or psychoactive contexts.