- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02051140
The Effect of Dietary Strawberry Supplementation on Older Adults
September 1, 2015 updated by: Barbara Shukitt-Hale, USDA Human Nutrition Research Center on Aging
This study is being conducted to assess the effect of dietary strawberry supplementation on cognition and mobility in older adults.
It is hypothesized that plant compounds, present in strawberries, may improve cognition and mobility by protecting against oxidative stress and inflammation.
Study Overview
Status
Completed
Conditions
Intervention / Treatment
Detailed Description
This study is being conducted to assess the effect of dietary strawberry supplementation vs. placebo on measures of cognition and mobility in older adults.
Participants will visit the HNRCA on 4 occasions.
During the first visit, participants will complete a dietary assessment and familiarize themselves with some of the cognitive tests used in the study.
After a period of up to 45 days participants will return for the second visit.
Participants will be randomized to consume either freeze dried strawberry powder or a placebo powder that tastes like strawberry.
At visits 2, 3 and 4, participants will undergo tests of cognition, memory, gait and balance.
In addition, blood samples and 24-hour urine will be collected at these visits.
Tests include balance and gait assessment using a treadmill instrumented with pressure sensors which will measure postural sway and a variety of spatial/temporal gait parameters.
Participants will also be affixed with surface electrodes to measure the activation of muscles in their legs during these balance and gait measurements.
Participants will complete a battery of cognitive tests on paper and by computer.
In the time between participants' visit 2 and visit 4, participants will receive a weekly telephone call to check in with them and remind them to continue taking the study powder.
At the very end of the study, when all participants are finished, participants will receive a telephone call to debrief them and notify them which group they were randomized into.
An optional tissue banking protocol will be offered for collection of additional blood to be banked at visits 2-4.
Study Type
Interventional
Enrollment (Actual)
54
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
-
-
Massachusetts
-
Boston, Massachusetts, United States, 02111
- Jean Meyer USDA Human Nutrition Research Center on Aging at Tufts University
-
-
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
60 years to 75 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Men and women are between the ages of 60 and 75 years
- Body mass index 18.5-29.9 kg/m2
- Adequate visual acuity or corrected visual acuity to read and perform computer tasks.
- Fluency in spoken and written English
- Ability to walk independently for 20 minutes
- Absence of menstruation for a minimum of 12 months or surgical menopause.
Exclusion Criteria:
- Self-reported vegetarian or vegan.
- Any condition that has resulted in cognitive deficits, including but not limited to - Alzheimer's disease or other dementias, cerebrovascular accident, or head injury
- History of any neurologic disorder resulting in permanent or relapsing/remitting neurologic impairment including but not limited to Parkinson's disease, amyotrophic lateral sclerosis, Huntington's disease, peripheral neuropathy, or radiculopathy.
- History of any condition resulting in permanent muscle or mobility deficit that would interfere with walking independent of assistance for 20 minutes, including but not limited to amputation, fracture, arthritis, myopathy, or limb, hip or back surgery within the last year.
- Self-reported cognitive, memory, neurologic or functional deficits that are stated to interfere with activities of daily living or functional status.
- Any chronic condition associated with increased risk of falls such as vestibular disease, orthostatic hypotension or neuropathy.
- Falls within the last year, that occurred in the course or routine daily activities, which were not precipitated by unusual circumstances such as being pushed or falling on ice.
- Regular use (i.e. that cannot or should not be discontinued for the entire study period, as per the subject's personal physician) of medications or dietary supplements known or suspected to influence cognitive function, attention, ability to ambulate, gait, balance, or risk of falls that in the opinion of the study physician may influence study results or increase risk with participation in the study.
- Psychiatric disorders that could in the opinion of the study physician interfere with study testing, including bipolar disorder, psychosis, and major depression
- MMSE score of less than 24 at screening
- Gastrointestinal disorders that influence digestion and absorption of food
- Diabetes mellitus
- Liver dysfunction
- History of cirrhosis
- SGPT, SGOT, or total bilirubin > 2 x upper limit of normal
- Kidney disease as indicated by serum creatinine > 1.5 mg/dL at screening
- Cardiac or pulmonary conditions that limit ambulation or results in dyspnea with ambulation with walking required as part of activities of daily living.
- Reported allergy to strawberry or ingredients in the placebo.
- Ethanol use estimated to be on average > 2 servings/day of beer (12-ounces), wine (5 ounces) or liquor (1.5 ounces), or self-reported binge-drinking.
- Illicit drug use in the last 12 months.
- Cigarette smoking within the last 6 months or current use of nicotine.
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: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: Strawberry
Participants randomized into this arm of the study consume freeze-dried strawberry.
|
12g freeze-dried strawberry (powder), twice daily with water, for 90 days
|
Placebo Comparator: Placebo
Participants randomized into this arm of the study consume a strawberry placebo.
|
12g blue, strawberry-flavored powder, twice daily with water, for 90 days
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Cognition
Time Frame: Change from baseline at 45 days
|
Spatial memory and learning (virtual water maze); short-term memory (digit span), verbal learning and memory (California verbal learning Test), executive function (trail making test, task switching test), attention (attention network test)
|
Change from baseline at 45 days
|
Cognition
Time Frame: Change from baseline at 90 days
|
Spatial memory and learning (virtual water maze); short-term memory (digit span), verbal learning and memory (California verbal learning Test), executive function (trail making test, task switching test), attention (attention network test)
|
Change from baseline at 90 days
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Gait
Time Frame: Change from baseline at 90 days
|
gait speed, step length variability, step width variability via instrumented treadmill
|
Change from baseline at 90 days
|
Gait
Time Frame: Change from baseline at 45 days
|
gait speed, step length variability, step width variability via instrumented treadmill
|
Change from baseline at 45 days
|
Other Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Balance
Time Frame: Change from baseline at 45 days
|
sway velocity and sway area via pressure-sensor
|
Change from baseline at 45 days
|
Balance
Time Frame: Change from baseline at 90 days
|
sway velocity and sway area via pressure-sensor
|
Change from baseline at 90 days
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Collaborators
Investigators
- Study Director: Barbara Shukitt-Hale, PhD, USDA/ARS
- Principal Investigator: Tammy Scott, PhD, Tufts University
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.
General Publications
- Miller MG, Shukitt-Hale B. Berry fruit enhances beneficial signaling in the brain. J Agric Food Chem. 2012 Jun 13;60(23):5709-15. doi: 10.1021/jf2036033. Epub 2012 Feb 3.
- Joseph JA, Shukitt-Hale B, Denisova NA, Bielinski D, Martin A, McEwen JJ, Bickford PC. Reversals of age-related declines in neuronal signal transduction, cognitive, and motor behavioral deficits with blueberry, spinach, or strawberry dietary supplementation. J Neurosci. 1999 Sep 15;19(18):8114-21. doi: 10.1523/JNEUROSCI.19-18-08114.1999.
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
May 1, 2014
Primary Completion (Actual)
August 1, 2015
Study Completion (Actual)
August 1, 2015
Study Registration Dates
First Submitted
January 29, 2014
First Submitted That Met QC Criteria
January 29, 2014
First Posted (Estimate)
January 31, 2014
Study Record Updates
Last Update Posted (Estimate)
September 2, 2015
Last Update Submitted That Met QC Criteria
September 1, 2015
Last Verified
September 1, 2015
More Information
Terms related to this study
Keywords
Additional Relevant MeSH Terms
Other Study ID Numbers
- ARS-2014-1
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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