Cardiovascular Diseases, Oxidative Stress, Vascular Dilation
Conditions
Brief summary
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.
Detailed description
The current set of trials will be of an acute (single intake, followed over 6 hours) that examines the postprandial response of individuals to the products. These preclinical trials will be conducted in the same individuals in an crossover design in order to limit individual variability, and keep the numbers small (5 individuals maximum), but still be able to assess the response to the different products.
Interventions
OTHERLow Flavanol Cocoa Powder
Measure the response 2 and 6 hours post low flavanol cocoa intake
OTHERHigh Flavanol Cocoa Powder
Measure the response 2 and 6 hours post high flavanol cocoa intake
OTHERVine to Bar Chocolate - 2 servings
Measure the response 2 and 6 hours post chocolate intake
OTHERVine to Bar Chocolate - 1 serving
Measure the response 2 and 6 hours post chocolate intake
OTHERVine to Bar Chocolate covered almonds
Measure the response 2 and 6 hours post chocolate covered almond intake
Sponsors
University of California, Davis
Study design
Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
OTHER
Masking
DOUBLE (Subject, Investigator)
Masking description
Low and High flavanol cocoa will be provided in coded packaging.
Intervention model description
Acute crossover design
Eligibility
Sex/Gender
MALE
Age
30 Years to 50 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| Framingham Reactive Hyperemia Index (fRHI) | 6 hours | measurement of microvascular function using peripheral arterial tonometry (EndoPAT2000) |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Platelet aggregation | 6 hours | Platelet aggregation after collagen activation will be assessed using platelet aggregometry |
| soluble NADPH oxidase | 6 hours | measure of oxidative stress |
| Glucose | 6 hours | Plasma glucose will be measured |
| Insulin | 6 hours | Serum insulin levels will be measured |
| Total nitrate | 6 hours | circulating levels of nitrate |
Countries
United States
Contacts
CONTACTRoberta R Holt
PRINCIPAL_INVESTIGATORCarl L Keen
Distinguished Professor Emeritus of Nutrition
Outcome results
None listed