This is interesting - https://www.goodhousekeeping.com/health/diet-nutrition/a71254435/can-mushrooms-boost-brain-health/ TLDR: Eat at least four servings of oyster/shiitake mushrooms a week. Research shows improved cognitive function. Cha, et al. A randomised controlled study to investigate the cognitive, mood, metabolic and anti-inflammatory effects of chronic oyster mushroom intervention in healthy older adults. Food Funct. 2026; 17 (12): 5621–5633. https://doi.org/10.1039/d5fo04951b