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Eating seafood twice a week slows brain aging.
Mostly True
Accuracy: Mostly True. Mostly true: supplied evidence supports an association between eating fish/seafood about 1–2 times weekly and better cognitive aging outcomes. A systematic review says higher fish intake is linked to slower cognitive decline and preserved performance, especially among people consuming fish at least weekly. But results were not uniform, with some null findings, and one review cited in news focuses on lower Alzheimer’s/dementia risk rather than directly proving brain aging is slowed. The claim overstates certainty and causation.
Verdict confidence: 86/100. Verified excerpts support an association between regular fish/seafood intake around 1–2 weekly servings and preserved cognition/slower decline, especially [S1P1][S1PF1]. But evidence is observational, findings are not uniform, and the exact 'slows brain aging' causal phrasing is broader than the excerpts directly establish [S4P1]. Method: verdict-evidence-v1. Not a calibrated probability.