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NPJ science of food·Apr 2026

Eating More Fruits, Fish, Nuts, and Dairy Tied to Slower Cognitive Decline

Key Insight

This study suggests a diet rich in fruits, vegetables, nuts, legumes, fish, and dairy may help preserve cognition.


In over 3,000 Chinese older adults tracked for about five years, those who ate more from six protective food groups (fruits, vegetables, nuts, legumes, fish, and dairy) showed slower cognitive decline. People scoring highest on this diet scale declined about 0.42 points per year slower on a cognitive test compared to those scoring lowest. The effect was modest but consistent across different ways of measuring cognition.

Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.