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Blueberry brain boost? study planned but never started

NCT ID NCT07170943

Knowledge-focused Sponsor: Wageningen University Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled This study
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study was designed to test whether eating blueberries or taking blueberry powder every day for 12 weeks could improve memory and thinking in older adults with mild memory complaints. It planned to include people aged 65 and older who were overweight and had some memory concerns. However, the study was withdrawn before any participants were enrolled, so no results are available.

What this could mean

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

Active substance
blueberry (whole fruit or freeze-dried powder)
What this could lead to
If it works, this could point toward a simple dietary way to support brain health in older adults.
What could go wrong
This trial was withdrawn before enrolling anyone, so no results are available. Even if run, the effect may be small or not apply to everyone.

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

Study facts

What this study's own registry entry says, in plain language.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Expected to start

Nov 2021

An estimate. Start dates often move.

Expected to finish

Oct 2022

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

65 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Age ≥65y * Overweight, body mass index ≥25 kg/m2 * Mild memory complaints, i.e. ≥22 points on the Cognitive Failure Questionnaire (CFQ) and reporting to have memory complaints and being hampered by these complaints * No mild cognitive impairment, i.e. ≥26 points on the Montreal Cognitive Assessment (MoCA) * Able to understand and perform the study procedures Exclusion Criteria: * Body Mass Index (BMI) ≥35 kg/m2 * Current use of \>500 mg/day of acetylsalicylic acid * Current use of antidepressants * Current use of medication that affects inflammation (anti-inflammatory medication) * Current or recent (\<1 month) use of berry supplements * Current or recent (\<1 month) use of anti-inflammatory dietary supplements such as fish oil, quercetin, curcumin, resveratrol, and/or other flavonoids * Current or recent (\<3 month) use of antibiotics. * Berry consumption of more than 1 serving (150g) per week * Not willing to quit anthocyanin-rich product consumption during the study period * Allergy to berries/salicylates * Having a current disease which interferes with the effect of berries/ freeze-dried berry powder and/or with the outcome measure (cognitive functioning), including diagnosis of dementia, psychiatric disorders, gastro-intestinal disease, diabetes, and cancer, as judged by a medical doctor * Excessive alcohol consumption (on average \>21 glasses/week for men and \>14 glasses/week for women) * Current participation in other scientific research

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Conditions

The condition(s) this trial relates to.

cognitive disorder Cognitive Dysfunction

As listed by the trial registrant

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

Aging Cognition disorders in old age Cognitive decline

More trials for these conditions

Other studies related to the condition(s) this trial covers.