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Wine grape leftovers could be a Heart-Healthy superfood

NCT ID NCT06476795

Disease control 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 Aug 07, 2026 · Last updated Aug 07, 2026

Summary

This pilot study tests whether adding powder made from Chardonnay grape skins and seeds to the daily diet can improve gut and heart health. The study includes postmenopausal women aged 45-70 with excess weight and high triglycerides. Participants will consume the powder daily, and researchers will measure markers like blood vessel function, cholesterol, blood sugar, and gut-related compounds. The goal is to see if this wine byproduct could be a practical source of beneficial flavanols and fiber.

What this could mean

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

Active substance
Chardonnay marc powder (dried skins and seeds of Chardonnay grapes)
What this could lead to
If this works, it could point toward a simple dietary addition that supports heart and gut health in at-risk women.
What could go wrong
This is a very small pilot study with only 5 participants, so results may not apply broadly. The effects on cholesterol, blood sugar, and inflammation are uncertain.

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 5 people

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

Started

Jun 2024

Expected to finish

Jun 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 70 years

Sex

Female participants only

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: * Postmenopausal female, with a cessation of menses for at least 2 years * 45-70 years of age * BMI 25- 49.9 kg/m2 * Fasting triglycerides \> 120 mg/dL * Subject is willing and able to comply with the study protocols and procedures. Exclusion Criteria: * Self-reported use of daily anticoagulation agents including aspirin, NSAIDs * Prescription medications and supplements, except for a 6 month stable dose of thyroid medications * Vegan, Vegetarians, food faddists or those consuming a non-traditional diet * Fruit consumption ≥ 3 cups/day * Vegetable consumption ≥ 4 cups/day * Coffee/tea ≥ 3 cups/day * Dark chocolate ≥ 3 oz/day * Self-reported restriction of physical activity due to a chronic health condition * Self-reported chronic/routine high intensity exercise * Blood pressure ≥ 140/90 mm Hg * Self-reported renal or liver disease * Self-reported heart disease, which includes cardiovascular events and stroke, diabetes * Peripheral artery disease Raynaud's syndrome or disease * Inability to properly place or wear the PAT probes or abnormal measurements on pre-screening PAT * Self-reported cancer within past 5 years * Self-reported gastrointestinal disorders, apart from appendix removal * Unwillingness to stop any supplement use, including herbal, plant or botanical, fish oil, oil supplements six weeks prior to study enrollment. * Indications of substance or alcohol abuse within the last 3 years * All forms of smoking (e.g. vaping, cigarette, cannabis) * Current enrollee in a clinical research study.

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Conditions

The condition(s) this trial relates to.

abdominal obesity-metabolic syndrome cardiovascular disorder metabolic syndrome X Obesity obesity disorder

As listed by the trial registrant

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

Adiposity Cardiometabolic syndrome Cardiovascular diseases

How to take part

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  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

  • University of California, Davis

    RECRUITING

    Davis, California, 95616, United States

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