A handful of walnuts a day: could it keep the aging mind sharp?
NCT ID NCT06942351
First seen Aug 07, 2026 · Last updated Aug 07, 2026
Summary
This study tests whether eating 1.5 ounces of walnuts every day for 12 weeks can improve memory, thinking speed, and flexibility in healthy adults aged 55 and older. Researchers will also check if walnuts reduce inflammation and oxidative stress, and whether they change the balance of bacteria in the gut. Half of the participants will eat walnuts, while the other half will eat calorie-matched crackers as a comparison.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- Walnuts
- What this could lead to
- If walnuts improve cognitive function or gut health in older adults, this could point toward a simple dietary strategy to support healthy aging.
- What could go wrong
- This is a small, early-stage study, and results may not apply to everyone. Any benefits might be modest, and the study doesn't prove walnuts prevent dementia or other conditions.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Oregon State University
Corvallis, Oregon, 97331, United States
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