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Pecan power: daily nut intake may improve heart, gut, and brain health

NCT ID NCT07227259

Knowledge-focused Sponsor: University of California, Davis Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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 Results may not be published yet.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
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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looks at whether eating 2 ounces of pecans daily for 3 months can improve blood fats, inflammation, blood pressure, thinking skills, and gut bacteria in healthy adults aged 45 to 75. Participants will follow two diet periods—one with pecans and one without—and provide blood, stool, and health questionnaires. The goal is to understand how pecans affect overall body metabolism.

What this could mean

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

Active substance
pecan nuts
What this could lead to
If it works, this could show that eating pecans daily supports heart health, metabolism, and brain function in middle-aged and older adults.
What could go wrong
This is a small, early-stage study with only 40 healthy participants, so results may not apply to everyone. Dietary studies are hard to control, and benefits may be modest or not seen.

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.

Participants

About 40 people

The number the study aims to enrol. It can still change while the study runs.

Started

Nov 2025

Expected to finish

Dec 2027

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

45 to 75 years

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: BMI of 20-35 kg/m2, ability to understand the intervention instructions, Willingness to follow the dietary intervention, Willingness to provide biological samples (blood and stool) - Exclusion Criteria: Allergy to pecan or other nuts, Cognitive impairment due to dementia of any type and inability to understand or comply with intervention instructions, Use of menopausal hormone replacement therapy, Use of antibiotics or probiotics in the 2 months prior to enrollment, Uncontrolled diabetes with HbA1C of \>9.5, Vegetarian/vegan, Any serious medical condition (such as chronic kidney disease of stage 3 or greater, heart failure, active cancer treatment, inflammatory bowel disease, etc.), Consumption of supplements that may interfere with vascular response or gut microbiome, Use of statin drugs for cholesterol lowering. \-

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As listed by the trial registrant

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

Healthy adults

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Ragle Human Nutrition Center, UC Davis campus

    RECRUITING

    Davis, California, 95616, United States

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