Impact of Almond Supplementation on Body Composition in Overweight/Obese Minority Adults

Sponsor

Columbia University (Other)

Overall Status

Completed

CT.gov ID

NCT02347007

Collaborator

Almond Board of California (Other)

Enrollment

Location

Arms

Actual Duration (Months)

0.5

Patients Per Site Per Month

Study Details

Study Description

Brief Summary

The purpose of this study is to determine whether introducing almonds into the diet of overweight and obese Blacks and Hispanics improves body composition, decreases liver fat, and lowers cardiovascular disease profile.

Condition or Disease	Intervention/Treatment	Phase
Obesity Overweight Fatty Liver Metabolic Syndrome X	Dietary Supplement: Almond Dietary Supplement: Cereal Bar	N/A

Detailed Description

The study is a randomized, controlled study aimed at testing whether almonds, consumed within a free-living, self-selected diet, improve body composition and liver fat, relative to a low-fat/high-carbohydrate cereal bar (LF-HC) in overweight and obese Blacks and Hispanics. A secondary aim is to determine whether almond consumption will lead to an overall lower CVD risk profile.

Participants will be randomized to consume approximately 17.5% of their estimated energy requirements from almonds daily (2-3 oz) or a high-carbohydrate cereal bar (2 g of fat or less per 100 kcal) providing an equivalent amount of calories. Prescribed energy requirements will be determined for each participant individually using the Mifflin St Jeor Equation equation with an activity factor of 1.3. Participants will be asked to consume half of their food supplement as a mid-afternoon snack and the rest at a meal of their choice.

At the baseline visit, participants will be given a 2-week supply of their allocated food supplement and will obtain additional supplies at bi-weekly visits for the first 8 weeks. After the week 8 visit, participants will be given monthly rations of their food supplement, either almonds or LF-HC cereal bar, and will be asked to come to research center every 4 weeks to obtain their next supply. At those visits, body weight and blood pressure will be measured and participants will turn in weekly dietary diaries, reporting their supplement intake. Participants will also receive one random phone call every 4 weeks to provide a 24-h recall. This recall will be used as an index of dietary quality but also as a compliance check with dietary supplements. In addition, 3-day food records will be collected prior to the start of the study and during the final week to assess any dietary changes due to the intervention. A food frequency questionnaire will also be administered at screening and endpoint of the study. This food-frequency questionnaire will target nut consumption.

At the end of the study, intention to continue eating almonds or a low-fat diet will be assessed using questions adapted from de Bruijn et al. Participants in the almond group will be asked the following questions: (1) "I intend to include almonds in my diet" (+2 = yes, definitely; -2 = no, definitely); (2) "How certain are you that you will include almonds in your diet?" (+2 = very certain; -2 = very uncertain); (3) "Including almonds in my diet is" (instrumental attitude: +3 = healthy; -3 = unhealthy; affective attitude: +3 = pleasant; -3 = unpleasant); (4) "I find including almonds in my diet" (perceived behavioral control: +3 = easy; -3 = difficult). Corresponding questions for the control group will replace "include almonds" with "reduce the amount of fat". Participants will be called 4 weeks later to obtain information on their actual almond and fat intakes by questionnaire and 24-h recall.

Study Design

Study Type:

Interventional

Anticipated Enrollment :

26 participants

Allocation:

Randomized

Intervention Model:

Parallel Assignment

Masking:

None (Open Label)

Primary Purpose:

Treatment

Official Title:

Impact of Almond Supplementation, Relative to a Low-fat, High Carbohydrate Control, on Body Composition in Overweight and Obese Black and Hispanic Adults

Actual Study Start Date :

Oct 1, 2014

Actual Primary Completion Date :

Jun 1, 2016

Actual Study Completion Date :

Mar 1, 2019

Arms and Interventions

Arm	Intervention/Treatment
Experimental: Almond	Dietary Supplement: Almond Participants will be randomized to consume approximately 17.5% of their estimated energy requirements from almonds daily for 24 weeks. Prescribed energy requirements will be determined for each participant individually using the Mifflin St Jeor Equation equation with an activity factor of 1.3. Participants will be asked to consume half of their daily almond supplement as a mid-afternoon snack and the rest at a meal of their choice.
Active Comparator: Cereal Bar	Dietary Supplement: Cereal Bar Participants will be randomized to consume approximately 17.5% of their estimated energy requirements from cereal bars daily for 24 weeks. Prescribed energy requirements will be determined for each participant individually using the Mifflin St Jeor Equation equation with an activity factor of 1.3. Participants will be asked to consume half of their daily cereal bar supplement as a mid-afternoon snack and the rest at a meal of their choice.

Arm

Intervention/Treatment

Experimental: Almond

Dietary Supplement: Almond

Participants will be randomized to consume approximately 17.5% of their estimated energy requirements from almonds daily for 24 weeks. Prescribed energy requirements will be determined for each participant individually using the Mifflin St Jeor Equation equation with an activity factor of 1.3. Participants will be asked to consume half of their daily almond supplement as a mid-afternoon snack and the rest at a meal of their choice.

Active Comparator: Cereal Bar

Dietary Supplement: Cereal Bar

Participants will be randomized to consume approximately 17.5% of their estimated energy requirements from cereal bars daily for 24 weeks. Prescribed energy requirements will be determined for each participant individually using the Mifflin St Jeor Equation equation with an activity factor of 1.3. Participants will be asked to consume half of their daily cereal bar supplement as a mid-afternoon snack and the rest at a meal of their choice.

Outcome Measures

Primary Outcome Measures

Change in body Composition [Baseline and endpoint visits (Weeks 0 and 24)]
MRI will be used to provide information on total adipose tissue and all adipose tissue sub-compartments: visceral, subcutaneous, intermuscular.
Change in liver Fat [Baseline and endpoint visits (weeks 0 and 24)]
MRS will be used to provide information on liver adiposity.

Secondary Outcome Measures

Change in cardio-metabolic risk profile [Baseline, midpoint, and endpoint visits (weeks 0, 12, and 24)]
Blood draw and analyses will be used to measure total and low-density lipoprotein cholesterol, triglycerides, high-density lipoprotein cholesterol, glucose, insulin, and inflammatory markers.
Change in brain-derived neutrophic factor (BDNF) [Baseline, midpoint, and endpoint visits (weeks 0, 12, and 24)]
Blood draw and analyses will be used measure BDNF.
Change in quality of life [Baseline and endpoint visits (weeks 0 and 24)]
SF-36 questionnaire will be used to assess quality of life.

Eligibility Criteria

Criteria

Ages Eligible for Study:

30 Years to 65 Years

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

Yes

Inclusion Criteria:

Black and/or Hispanic
Body Mass Index (BMI) 25-35 kg/m^2
Weight stable (+/- 2.5 kg) for at least 3 months prior to screening
Body weight less than 300 pounds
Adherence to an acceptable form of contraception (for women)
If taking medicine, dose must have been stable before study; must remain on same medication and dose throughout study.

Exclusion Criteria:

Diabetes
Uncontrolled hypertension (high blood pressure)
Cardiovascular disease
Weight loss attempted in past 3 months
Eating disorder
Stroke, seizure disorder, or significant neurological disease
Unstable of uncontrolled medical illness including active malignancies within past 5 years
Untreated or unstable hypothyroidism
Hyperthyroidism
Diagnosis of psychoses, bipolar disorder, major depression, severe personality disorder; history of suicidal tendencies
Alcohol or substance abuse in the past 6 months
Pregnant, planning pregnancy in the next 6 months, or breast-feeding
Participating or planning to participate in a commercial diet or behavior modification program (ex: Weight Watchers)
Allergy or sensitivity to wheat/grain products or nuts
Gastrointestinal disorder.