Clinical trial Recruiting at 1 site Interventional Ages 45 to 70 Women only

Effects of Chardonnay Marc on gut and heart health

Official title: The Influence of Chardonnay Marc Intake on Gut and Cardiometabolic Health

Run by University of California, Davis · NCT06476795 · Data updated 2026-11-12

This study is testing if adding Chardonnay grape skins and seeds to the diet can improve gut and heart health in obese postmenopausal women.

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Quick facts

Study typeInterventional
Ages45 Years to 70 Years
SexWomen only
Enrollment5 (estimated)
SponsorUniversity of California, Davis
Academic / other
Locations1 site (Davis, California)
StatusRecruiting
StartedJune 1, 2024
Main results expectedJune 2027
Study endsJune 2027
Registry record updatedAugust 7, 2026
Trial IDNCT06476795 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are postmenopausal women aged 45-70 with a BMI between 31-49.9 kg/m2 and elevated fasting triglycerides.

Probably not a fit

Patients who are on anticoagulants, have certain chronic health conditions, or follow restrictive diets may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study investigates the impact of incorporating Chardonnay Marc, the skins and seeds of Chardonnay grapes, into the diet on gut and cardiometabolic health. Participants will consume varying amounts of Chardonnay Marc powder daily for 12 weeks, with assessments conducted at baseline, 6 weeks, and 12 weeks. The study aims to collect pilot data on changes in gut permeability, inflammation, and cardiometabolic markers in obese postmenopausal women. Participants will log their intake and how they incorporate the Marc into their meals.

Why it matters

Potential benefit: If successful, this study could provide a novel dietary approach to improve gut and cardiovascular health in obese individuals.

How similar studies have gone: While the specific use of Chardonnay Marc is novel, similar dietary interventions with flavanol-rich foods have shown promise in improving cardiovascular health.

Who can join: the full rules

Show full inclusion / exclusion criteria
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.

Where it's running

  • University of California, Davis
    Davis, California, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.