Adaptation in Polyphenol Bioavailability and Bioactivity During Long Term Exposure to Polyphenol-Rich Foods

January 15, 2015 updated by: Janet Novotny, USDA Beltsville Human Nutrition Research Center
There are two primary objectives to be addressed in this study: to assess the differential response in bioavailability and metabolic pathways between lean and obese individuals exposed to acute, short term (14 day), and long-term (10-week) consumption of polyphenol-rich fruits (berries and apple), and beverages (tea); and to determine the differential systemic and gut anti-inflammatory response between obese and lean individuals exposed to polyphenol-rich fruits (berries and apple), and beverages (tea).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
28

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • Maryland
      • Beltsville, Maryland, United States, 20705
        • Beltsville Human Nutrition Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

25 years to 75 years (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Genders Eligible for Study

All

Description

Exclusion Criteria:

  • Younger than 25 years old or older than 75 years old
  • Use of blood-thinning medications such as Coumadin (warfarin), Dicumarol (dicumarol), or Miradon (anisindione)
  • Presence of any gastrointestinal disease, metabolic disease, bariatric surgery, or malabsorption syndromes that may interfere with the study goals
  • Have been pregnant during the previous 12 months, are currently pregnant or lactating, or plan to become pregnant during the study
  • Type 2 diabetes requiring the use of oral antidiabetic agents or insulin
  • Fasting triglycerides greater than 300 mg/dL
  • Fasting glucose greater than 126 mg/dL
  • History of eating disorders or other dietary patterns which are not consistent with the dietary intervention (e.g., vegetarians, very low fat diets, high protein diets)
  • Use of prescription or over-the-counter antiobesity medications or supplements (e.g., phenylpropanolamine, ephedrine, caffeine) during and for at least 6 months prior to the start of the study or a history of a surgical intervention for obesity
  • Active cardiovascular disease (such as a heart attack or procedure within the past three months or participation in a cardiac rehabilitation program within the last three months, stroke, or history/treatment for transient ischemic attacks in the past three months, or documented history of pulmonary embolus in the past six months).
  • Use of any tobacco products in past 3 months
  • Unwillingness to abstain from herbal supplements for two weeks prior to the study and during the study
  • Known (self-reported) allergy or adverse reaction to study foods
  • Unable or unwilling to give informed consent or communicate with study staff
  • Self-report of alcohol or substance abuse within the past twelve months and/or current acute treatment or rehabilitation program for these problems (Long-term participation in Alcoholics Anonymous is not an exclusion)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Polyphenol Diet
After 2 weeks of adaptation to a controlled diet, polyphenol-rich fruits (berries and apple) and beverages (tea) will be fed (8 wks) as part of a controlled diet (10 wks total).
Other: Controlled diet

Volunteers will be provided a controlled diet during the entirety of the 10 week treatment period. Meals will be prepared using traditional American foods.

The controlled diet will include polyphenol-rich foods, including apples, berries, and green tea. A blend of multiple polyphenol-rich foods was chosen to investigate whole foods, multiple commodities, and multiple bioactives.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Polyphenol metabolites - Wk 2
Time Frame: 2 weeks after start of intervention
Polyphenol metabolites will be measured in blood and urine after 2 weeks of a controlled diet.
2 weeks after start of intervention
Polyphenol metabolites - Wk 4
Time Frame: 4 weeks after start of intervention
Polyphenol metabolites will be measured in blood and urine after 4 weeks of a controlled diet. Weeks 3 and 4 will contain fruits and beverage rich in polyphenols.
4 weeks after start of intervention
Polyphenol metabolites - Wk 10
Time Frame: 10 weeks after start of intervention
Polyphenol metabolites will be measured in blood and urine after 10 weeks of a controlled diet. Weeks 3 through 10 will contain fruits and beverage rich in polyphenols.
10 weeks after start of intervention
Systemic inflammation - Wk 2
Time Frame: 2 weeks after start of intervention
Markers of inflammation (such as CRP, serum amyloid A, IL-6, IL-1B, TNF, and interferon-gamma will be measured.
2 weeks after start of intervention
Systemic Inflammation - Wk 4
Time Frame: 4 weeks after start of intervention
Markers of inflammation (such as CRP, serum amyloid A, IL-6, IL-1B, TNF, and interferon-gamma will be measured.
4 weeks after start of intervention
Systemic Inflammation - Wk 10
Time Frame: 10 weeks after start of intervention
Markers of inflammation (such as CRP, serum amyloid A, IL-6, IL-1B, TNF, and interferon-gamma will be measured.
10 weeks after start of intervention

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Gastrointestinal Health - Wk 2
Time Frame: 2 weeks after start of intervention
Gut permeability and inflammation will be measured in fecal samples.
2 weeks after start of intervention
Gastrointestinal Health - Wk 4
Time Frame: Wk 4
Gut permeability and inflammation will be measured in fecal samples.
Wk 4
Gastrointestinal Health - Wk 10
Time Frame: 10 weeks after start of intervention
Gut permeability and inflammation will be measured in fecal samples.
10 weeks after start of intervention

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
USDA Beltsville Human Nutrition Research Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
July 1, 2014

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 1, 2014

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 1, 2014

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 21, 2014

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
July 22, 2014

First Posted (Estimate)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 23, 2014

Study Record Updates

Last Update Posted (Estimate)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
January 16, 2015

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 15, 2015

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2015

More Information

Terms related to this study

Keywords

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • HS46

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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