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Chardonnay Marc and Vascular Response

University of California, Davis · NCT05545865

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Opens the official ClinicalTrials.gov record, with the study team’s contacts. Bored Studies doesn’t enroll anyone.

Key facts

Compensation
Not posted. Ask the study team before screening.
Who can join
Ages 30–50 · Men only
Healthy volunteers
Accepted
Study type
Interventional · Not applicable
Target enrollment
5
US sites recruiting
1
Study start
September 1, 2022
Record last updated
February 18, 2026

Status re-checked against ClinicalTrials.gov within the last 12 hours.

What the study is about

This study aims to obtain data on the potential influence of Vine to Bar product(s) containing Chardonnay marc on cardiometabolic health. These initial studies will inform the design and timing of data collection for future dietary intervention trials that will examine the influence of Chardonnay marc intake on outcomes/biomarkers of both cardiometabolic health and the gut microbiome. This includes collecting data on the potential differences in response to the products based on the unique food matrix for each of the products that will be tested. Moreover, as there is a paucity of data on the influence of cocoa flavanol intake on vascular function beyond 4 hours post intake, the response of the selected outcomes will be assessed after 6 hours of flavanol intake. This is a time point that captures the increased circulating presence of microbial derived flavanol metabolites.

Being studied: Low Flavanol Cocoa Powder; High Flavanol Cocoa Powder; Vine to Bar Chocolate - 2 servings; Vine to Bar Chocolate - 1 serving; Vine to Bar Chocolate covered almonds

Conditions: Cardiovascular Diseases; Vascular Dilation; Oxidative Stress

Eligibility criteria

Copied from the official record. The study team makes the final decision at screening.

Show full criteria

Inclusion Criteria

  • Screening or Visit 1 Reactive Hyperemia Index (RHI; EndoPAT 2000) \< 2.0
  • Subject is willing and able to comply with the study protocols.
  • Subject is willing to participate in all study procedures
  • BMI 25.0 - 35 kg/m2

Exclusion Criteria

  • BMI ≥ 35 kg/m2
  • Indivduals that weight less than a 110 lbs
  • Donation of blood within the previous 30 days
  • Visit 1 Reactive Hyperemia Index (RHI; EndoPAT 2000) ≥ 2.0
  • 1 ug/ml and 3 ug/ml collagen screening maximal platelet aggregatory response of \< 65%.
  • Platelet counts \< 150,000 / ul
  • Anemia, which includes self report, or a screening hemoglobin and hematocrit that is less than the normal reference range or as diagnosed by study physician upon review of complete blood cell count reports.
  • Dislike or allergy for nuts, cocoa or grape products
  • Self-reported use of daily anticoagulation agents including aspirin, NSAIDs
  • Vegan, Vegetarians, food faddists or those consuming a non-traditional diet
  • Fruit consumption ≥ 3 cups/day
  • Vegetable consumption ≥ 4 cups/day
  • Nut intake ≥ 2 servings/ week
  • 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
  • Self-reported diabetes
  • Blood pressure ≥ 140/90 mm Hg
  • Self-reported renal or liver disease
  • Self-reported heart disease, which includes cardiovascular events and stroke
  • Peripheral artery disease, Raynaud's syndrome
  • 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 malabsorption
  • Currently taking prescription drugs or supplements.
  • Supplement use or unwillingness to stop any supplement use, including herbal, plant or botanical, fish oil, oil supplements a month prior to study enrollment.
  • Indications of substance or alcohol abuse within the last 3 years
  • smoking, vaping, cannabis use
  • Current enrollee in a clinical research study.

Recruiting US locations

  • Academic Surge, University of California, Davis

    Davis, CA 95616

    Site contact: Roberta R Holt, PhD · 530-400-5952 · rrholt@ucdavis.edu

Study contacts (from the official record)

  • Roberta R Holt · 5304005952 · rrholt@ucdavis.edu
All heart & blood pressure studies in California →
Chardonnay Marc and Vascular Response (NCT05545865) | Bored Studies