Evaluating the Availability of Berry Phytonutrients Post-consumption of Fresh and Processed Blueberry by Healthy Adults
Public ClinicalTrials.gov record NCT04175106. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Establishing Optimal Nutritional Quality of Blueberries: a Proof of Concept Study to Improve the Nutritional Quality of the Average Diet Using Common Plant Breeding and Processing Practices.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study will evaluate the availability of phytonutrients in two blueberry varieties, chosen for their phytonutrient levels. This will be compared to phytonutrient-matched processed protein bar and a macronutrient-matched control meal, in healthy human volunteers. Blueberry phytonutrients will be analyzed in blood and urine over a four-day period, 48h prior to consumption and 48h after. The participants will consume each of the four meals over a 3-month period (4-way crossover design, 4 blocks of 4-day periods). The main objective of this study is to compare the proportions of blueberry phytonutrients recovered in the blood and urine after ingestion of the four treatments. We hypothesize that phytonutrient content will be predictive of human bioavailability and that a berry-enriched processed product will have similar phytonutrient bioavailability to unprocessed berries. The results of this study may establish if the nutritional value of a berry can be predicted or enhanced to provide elevated nutritional quality, with the ultimate goal of maximizing the health benefits of fruit consumption. As it is challenging for many to increase their fruit and vegetable intake to government recommended levels (5+ servings per day), the present proof-of-concept study explores a reasonable approach to help consumers achieve optimal health associated with high fruit and vegetable intakes, within the context of current consumption patterns, through enhancement of the nutritional density and bioavailability of common fruits and consumer products.
Study identification
- NCT ID
- NCT04175106
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 29 participants
Conditions and interventions
Conditions
Interventions
- a non-traditional (i.e., not typically available in the supermarket) blueberry cultivar bred using natural plant breeding techniques and established as having enhanced nutritive value Other
- a standard commercially available blueberry variety (i.e., cultivar) Other
- a "minimally processed" blueberry-rich protein bar Other
- a control beverage of matched-nutritive content Other
Other
Eligibility (public fields only)
- Age range
- 25 Years to 65 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Dec 12, 2019
- Primary completion
- Oct 28, 2021
- Completion
- Oct 28, 2021
- Last update posted
- Feb 8, 2026
2019 – 2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Plants for Human Health Institute, North Carolina State University | Kannapolis | North Carolina | 28081 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04175106, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Feb 8, 2026 · Synced Sep 9, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04175106 live on ClinicalTrials.gov.