Effects of Chardonnay Marc on gut and heart health

The Influence of Chardonnay Marc Intake on Gut and Cardiometabolic Health

NA · University of California, Davis · NCT06476795

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

Quick facts

PhaseNA
Study typeInterventional
Enrollment5 (estimated)
Ages45 Years to 70 Years
SexFemale
SponsorUniversity of California, Davis (other)
Locations1 site (Davis, California)
Trial IDNCT06476795 on ClinicalTrials.gov

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.

Who should consider this trial

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

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

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

Eligibility criteria

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 this trial is running

Davis, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Cardiovascular Diseases, Adiposity, Cardiometabolic Syndrome

Last reviewed 2026-05-15 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.