Clinical trial registry record

Effect of Walnuts on Cognitive Function and Gut Microbiome in Older Adults

A registered study indexed because it matched monitored longevity research terms. Registry status: Active Not Recruiting. Registration does not establish safety or effectiveness.

Plain-language guide

Five questions to ask about this record

What this is
A clinical study registration, not a result or recommendation.
Why it may matter
The registry currently reports Active Not Recruiting.
Evidence
Registered phase not reported study.
Main limitation
Registration does not prove that the intervention works, is safe, or is available to you.
What changed
Registry metadata was last updated August 7, 2026.
Where to verify
Open the primary registry below for eligibility, locations, contacts, and current status.
Registry ID
NCT06942351
Last registry update
August 7, 2026
Status
Active Not Recruiting
Phase
Phase not reported
Sponsor
Oregon State University
Enrollment
90
Countries
United States
Match confidence
100%
Source feed
ClinicalTrials.gov
Automated source synopsis

A registered study indexed because it matched monitored longevity research terms. Registry status: Active Not Recruiting. Registration does not establish safety or effectiveness.

Evidence snapshot

What the source actually supports

Evidence stage
Phase not reported
Study design
RANDOMIZED · PARALLEL · BASIC SCIENCE · SINGLE
Evidence population
Human clinical study registration
Participants
90
Population
ALL · 55 Years
Duration
2025-06-09 to 2029-05-01
Intervention
Walnuts; Crackers
Comparator
Walnuts; Crackers
Outcomes measured
Cognitive function - memory, age adjusted — 0 and 12 weeks; Cognitive function - memory, proximity — 0 and 12 weeks; Cognitive function - cognitive flexibility, age adjusted — 0 and 12 weeks; Cognitive function - cognitive flexibility, proximity — 0 and 12 weeks; Cognitive function - speed of processing — 0 and 12 weeks; Gut microbiome composition — 0 and 12 weeks; Lipid oxidation levels — 0 and 12 weeks; Gut permeability and health: Inflammatory biomarkers — 0 and 12 weeks; Biomarkers of inflammation — 0 and 12 weeks; Urolithin concentrations — 0 and 12 weeks; Blood pressure — 0 and 12 weeks; Weight — 0 and 12 weeks
Reported result
No reusable finding-level result is available in this record.

Main limitationThis is a study registration. No reusable structured result is available here, so it cannot show whether the intervention worked or was safe.

Safety and approvalEligibility, adverse-event details, and clinical decisions must be checked in the official registry and with qualified clinicians. Trial registration is not regulatory approval and does not establish that an intervention is available.

Source supportStructured registry protocol metadata; no finding-level conclusion is generated.

Trial stage · Phase not reportedA trial phase describes development stage; it does not establish a positive result.
Phase 1Phase 2Phase 3Phase 4

Registration and recruitment status do not establish safety, efficacy, or regulatory approval.

Why this record appears here · 100% topic match

The title, summary, or source keywords matched one or more topics followed by immortal.life. A higher percentage means a stronger topic match; it does not rate safety, effectiveness, or study quality.

  • Microbiome and dysbiosis · 100%Title contains controlled term: microbiome. Abstract contains controlled term: microbiome. Title supplies longevity context: older adult. Study type is explicitly identified as INTERVENTIONAL.

Automated source check 100% · update recency 100%. These figures help sort records; they are not medical ratings.

microbiome dysbiosis
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