- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01932879
Blackberry Polyphenol Intake and Fuel Management
December 5, 2016 updated by: Janet Novotny, USDA Beltsville Human Nutrition Research Center
Studies in animals have suggested that berry preparations or anthocyanin-rich berry extracts can reduce body fatness.
Previous studies with tea catechins, which belong to the flavonoid class of chemicals as do anthocyanins, suggest that these compounds can alter fat oxidation, and this may be the mechanism by which body fatness is influenced by anthocyanin intake.
Well-controlled studies in humans are lacking.
Study Overview
Study Type
Interventional
Enrollment (Actual)
35
Phase
- 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
-
-
Maryland
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Beltsville, Maryland, United States, 20705
- USDA Beltsville Human Nutrition Research 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
Ages Eligible for Study
25 years to 75 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
Male
Description
Exclusion Criteria:
- Younger than 25 years old or older than 75 years old
- Female
- Use of blood-thinning medications such as Coumadin (warfarin), Dicumarol (dicumarol), or Miradon (anisinidione)
- Presence of any gastrointestinal disease, metabolic disease, 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., phenylpropanalamine, 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
- Use of oral or IV antibiotics during the month preceding the study
- 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 blackberries
- 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)
- Other medical, psychiatric, or behavioral factors that in the judgment of the Principal Investigator may interfere with study participation or the ability to follow the intervention protocol
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
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Blackberry
Participants will consume blackberries twice/day as part of a 1-week controlled diet.
|
Participants will be fed a higher fat, typical American diet for two 1-week periods.
Participants must consume only and all food provided during the intervention periods.
|
Other: Control
Participants will consume jello twice/day as part of a 1-week controlled diet.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Substrate oxidation
Time Frame: 23.5 hours
|
Participants will stay in a room calorimeter for 23.5 hours.
|
23.5 hours
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Glucose tolerance test
Time Frame: -15, 0, 30, 60, 90, 120, 180, 240 minutes
|
Blood will be collected at the end of each diet period, at the following times before and after breakfast: -15, 0, 30, 60, 90, 120, 180, 240 minutes.
|
-15, 0, 30, 60, 90, 120, 180, 240 minutes
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
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
July 1, 2013
Primary Completion (Actual)
April 1, 2016
Study Completion (Actual)
April 1, 2016
Study Registration Dates
First Submitted
August 27, 2013
First Submitted That Met QC Criteria
August 29, 2013
First Posted (Estimate)
August 30, 2013
Study Record Updates
Last Update Posted (Estimate)
December 7, 2016
Last Update Submitted That Met QC Criteria
December 5, 2016
Last Verified
December 1, 2016
More Information
Terms related to this study
Other Study ID Numbers
- HS44
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
product manufactured in and exported from the U.S.
No
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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