- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01007188
Energy Value of Macronutrients From Almonds and Mechanisms of Nutrient Action
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
The objective of this study is to measure the energy value of almonds in the human diet and study molecular mechanisms that may help explain the beneficial health effects of almonds.
Epidemiologic studies have demonstrated an inverse or no relationship between nut consumption and body weight, despite the fact that nuts are an energy dense food. Intervention studies have shown that consumption of nuts has no effect on body weight or an effect that is significantly less than predicted. Fecal analyses in studies with peanuts, almonds, and pecans have found increased fecal fat and energy loss with nut consumption; however studies with almonds are lacking.
Previous studies have suggested that nut consumption imparts a variety of health benefits, including reduction of cardiovascular disease and improved satiety. However, studies of almonds are extremely limited. The aim of this study is to determine the energy value of almonds in the human diet and to probe mechanisms by which almonds impart health benefits. The metabolizable energy value of almond nuts will be calculated based on the chemical composition and energy content of the consumed diet and excreta. This will provide a better estimate of the energy value of almonds than simply calculating energy value based on Atwater factors. In addition to determining the energy value of almonds, we will evaluate the effects of almond-rich diets on plasma phytonutrient levels and on gene expression changes to determine what protective mechanisms are activated by almond consumption.
Study Type
Enrollment (Anticipated)
Phase
- Not Applicable
Contacts and Locations
Study Locations
-
-
Maryland
-
Beltsville, Maryland, United States, 20705
- USDA-ARS, Beltsville Human Nutrition Research Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age 25 to 65 years at beginning of study
- BMI between 20 and 38 kg/m2
- Fasting glucose < 126 mg/dl
- Blood pressure < 160/100 (controlled with certain medications)
- Fasting total blood cholesterol < 280 mg/dl
- Fasting triglycerides < 300 mg/dl
Exclusion Criteria:
- Presence of kidney disease, liver disease, gout, hyperthyroidism, untreated or unstable hypothyroidism, certain cancers, gastrointestinal disease, pancreatic disease, other metabolic diseases, or malabsorption syndromes
- Type 2 diabetes requiring the use of oral antidiabetic agents or insulin
- History of bariatric or certain other surgeries related to weight control
- Smokers or other tobacco users (during 6 months prior to the start of the study)
- Antibiotic use during the intervention or for 3 weeks prior to any intervention period
- 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)
- Volunteers who have lost 10% of body weight within the last 12 months or who plan to initiate a weight loss program during the next 10 months
- Known (self-reported) allergy or adverse reaction to pistachios or other nuts
- Unable or unwilling to give informed consent or communicate with study staff
- Self-report of alcohol or substance abuse within the past 12 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
How is the study designed?
Design Details
- Allocation: Randomized
- Interventional Model: Crossover Assignment
- Masking: Double
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: 1.5PD
average American diet plus 1.5 oz per day almonds
|
average American diet plus 1.5 oz per day almonds
|
Other: Base
average American diet without almonds
|
average American diet without almonds
|
Active Comparator: 3.0PD
average American diet plus 3.0 oz per day almonds
|
average American diet plus 3.0 oz per day almonds
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
to measure the energy value of almonds in the human diet
Time Frame: 3 weeks
|
3 weeks
|
Secondary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
to study molecular mechanisms that may help explain the beneficial health effects of almonds
Time Frame: 3 weeks
|
3 weeks
|
Collaborators and Investigators
Collaborators
Investigators
- Principal Investigator: David J Baer, Ph. D., USDA Beltsville Human Nutrition Research Center
Publications and helpful links
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
Other Study ID Numbers
- 2009-412
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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