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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.
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.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Low Flavanol Cocoa Powder | Placebo Comparator | 12 g of Low Flavanol Cocoa Powder (30 mg of cocoa flavanols) provided as a beverage mixed in water |
|
| High Flavanol Cocoa Powder | Experimental | High Flavanol Cocoa Powder (435 mg of flavanols) will be provided as a beverage mixed in water. |
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| Two Servings of Vine to Bar Chocolate | Experimental | Two servings (60g, 6 pieces) of Vine to Bar Chocolate providing both cocoa flavanols and Chardonnay marc. |
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| One Serving of Vine to Bar Chocolate | Experimental | A single serving (30g, 3 pieces) of Vine to Bar Chocolate providing both cocoa flavanols and Chardonnay marc. |
|
| Vine to Bar Chocolate covered Almonds |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Low Flavanol Cocoa Powder | Other | Measure the response 2 and 6 hours post low flavanol cocoa intake |
|
| Measure | Description | Time Frame |
|---|---|---|
| Framingham Reactive Hyperemia Index (fRHI) | measurement of microvascular function using peripheral arterial tonometry (EndoPAT2000) | 6 hours |
| Measure | Description | Time Frame |
|---|---|---|
| Platelet aggregation | Platelet aggregation after collagen activation will be assessed using platelet aggregometry | 6 hours |
| soluble NADPH oxidase | measure of oxidative stress |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Roberta R Holt | Contact | 5304005952 | rrholt@ucdavis.edu |
| Name | Affiliation | Role |
|---|---|---|
| Carl L Keen | Distinguished Professor Emeritus of Nutrition | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Academic Surge, University of California, Davis | Recruiting | Davis | California | 95616 | United States |
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| ID | Term |
|---|---|
| D002318 | Cardiovascular Diseases |
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Acute crossover design
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Low and High flavanol cocoa will be provided in coded packaging.
| Experimental |
11 pieces (45g) of Vine to Bar Chocolate providing both cocoa flavanols and Chardonnay marc, with almonds |
|
| High Flavanol Cocoa Powder | Other | Measure the response 2 and 6 hours post high flavanol cocoa intake |
|
| Vine to Bar Chocolate - 2 servings | Other | Measure the response 2 and 6 hours post chocolate intake |
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| Vine to Bar Chocolate - 1 serving | Other | Measure the response 2 and 6 hours post chocolate intake |
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| Vine to Bar Chocolate covered almonds | Other | Measure the response 2 and 6 hours post chocolate covered almond intake |
|
| 6 hours |
| Glucose | Plasma glucose will be measured | 6 hours |
| Insulin | Serum insulin levels will be measured | 6 hours |
| Total nitrate | circulating levels of nitrate | 6 hours |