A handful of blueberries a day: a new weapon against cognitive decline?

NCT ID NCT05764824

Completed Prevention Sponsor: Brigham and Women's Hospital Source: ClinicalTrials.gov ↗

First seen Aug 13, 2026 · Last updated Aug 14, 2026 · Updated 1 time

Summary

This study tests whether taking a daily blueberry powder supplement for 24 weeks can improve memory and other thinking skills in adults aged 65 to 99. Participants will be randomly assigned to receive either the blueberry powder or a placebo, and researchers will measure changes in blood markers associated with brain injury. The goal is to see if this simple dietary addition could help protect the aging brain.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: Blueberry powder
What this could lead to: If effective, daily blueberry supplementation could offer a simple, natural way to support brain health and potentially slow cognitive decline in aging.
What could go wrong: This is a small, early-stage trial, and results may not be conclusive or generalizable. The benefits might be modest, and the study does not yet prove any effect on dementia or long-term cognitive outcomes.

This is an AI summary of the original study and may miss details. Read our disclaimer.

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Conditions

The condition(s) this trial relates to.

brain injury Cognitive Dysfunction

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

BRAIN INJURIES COGNITIVE DECLINE NUTRITION, HEALTHY

Contacts and locations

Locations

Mass General Brigham

Boston, Massachusetts, 02120, United States

More trials for these conditions

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