Most diet-and-cognition claims rest on observational studies that systematically over-promise, and the few large randomized trials that tested the headline diets came back muted. A skeptical-engineer walk through the Mediterranean and MIND data, omega-3s honestly, the supplement graveyard, and the one mechanism that actually holds up.
Cognition
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Diet and Cognition: What the Evidence Actually Supports, and What the Marketing Sells -
Walking as Infrastructure for Thinking The honest case for treating walking as a cognitive tool, not just exercise: what the default-mode network and incubation literature actually show, where the Stanford creativity studies replicate and where they don't, why the "10,000 steps" target is marketing and 7,000 is the real plateau, the metabolic cost of prolonged sitting, and how to wedge walking into a desk job.