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To determine the effect of consuming one avocado per day on decreasing body fat as compared to consuming your usual diet.

Target Population
Men and women ages 25 and older

Major Exclusions
<25 years old
BMI<25 for women; or BMI<27 for men
• Known chronic disease
• Consumption of > 2 avocados per month, or do not like to eat avocados
• Inability to complete an MRI
• Pregnant, lactating or planning pregnancy

Length of Study
6 months


Number of Visits
1 screening visit; between 8 and 15 study visits for collection of blood and clinical information (i.e. waist circumference, weight, and filling out questionnaires), four 24-hour dietary recalls, 2 abdominal MRI scans and to pick up avocados, depending on which group you are assigned.

Study diet
Avocados will be provided to participants who have been randomized to the “experimental” group, while participants randomized to the “control” group will continue their usual diet and will be provided up to 24 avocados upon study completion.

Potential volunteers will receive reimbursement for completing the screening visit, and an additional reimbursement for qualifying and completing the study.

Can I work?



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