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This research study will compare participants consuming a powdered strawberry supplement to a strawberry-flavored placebo powder over a 3-month period to determine the health effects of consuming a strawberry supplement on mobility and memory in older adults. Specifically, we are looking for individuals who have been told “to watch their sugar intake,” or that they are “pre-diabetic,” “insulin resistant,” or have elevated blood sugar (or hemoglobin A1C) levels but are not taking metformin or any other medications for diabetes to participate in this research study.

Target Population
Men and postmenopausal women, 55 to 75 years of age

Major Exclusions
Smoking or use of nicotine replacement products within the last 6 months
BMI 27.5-45 kg/m2
Vegetarian or vegan
Strawberry allergy
Unable to walk unassisted for 20 minutes
Liver or kidney disease
Neurological disorders

Length of Study
4 months

Number of visits
1 screening and 4 study visits


Study diet
Abstain from consuming berry fruits and foods/beverages containing berries but otherwise maintain your usual diet. Consume a powdered berry or placebo supplement twice daily for approximately 90 days. Participants will be provided with the strawberry or placebo powder over the course of the study.

$25 for screening visit, and up to $615 if you qualify and complete the study.

Can I work?
Yes, but not on the mornings of visits 2, 3 or 4.


Length of study

Total length of the study including resident stays and nonresident visits.
This does not mean you will be testing the entire time.

The length of time volunteers are required to stay overnight at the HNRCA. Residents have their own private room, bathroom, television, VCR, and phone during their stay.

The amount of reimbursement for travel and inconvenience.
Number of visits

Total number of nonresident visits.
Study diet

Indicates meals which will be provided by the HNRCA
Can I work?

Indicates if you will be able to work and if so, when.

For more information about this study, please call Volunteer Services at 1-800-738-7555 .

We appreciate your interest in our program and we hope to work with you in the future.

Thank you,
The Recruitment Office
Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University