STUDY: Effects of Potatoes in a Weight Loss Program

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

90 participants

Study Classification

INTERVENTIONAL

Study Start Date

2007-05-31

Study Completion Date

2014-03-31

Brief Summary

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The purpose of this study is to test whether diets that contain potatoes and differ in glycemic index/load will be useful in weight loss, blood sugar control and maintaining current body weight.

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Detailed Description

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The study will examine the effect of including potatoes as part of a calorie restricted diet designed to induce weight loss and improve glycemic control in overweight subjects.

This is a randomized, treatment-controlled, 3-arm, parallel study. The 3 arms of the study will include dietary manipulation in the free-living setting to include potatoes/potato products frequently in the diet (5-7 days / week). Two diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss and the control diet will be prescribed for weight maintenance. The two energy-restricted diets will include further manipulation, such that, one dietary plan will be a high glycemic index (GI) diet and the other a low glycemic index diet.

Conditions

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Obesity

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

SINGLE

Participants

Study Groups

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Control

Arm includes dietary manipulation in the free-living setting to include potatoes/potato products frequently in the diet (5-7 days / week). Control diet will be prescribed for weight maintenance.

Group Type EXPERIMENTAL

Control

Intervention Type BEHAVIORAL

Dietary manipulation in the free-living setting to include potatoes/potato products frequently in the diet (5-7 days / week). The control diet will be prescribed for weight maintenance.

Low Glycemic Index

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on Low Glycemic Index foods.

Group Type EXPERIMENTAL

Low Glycemic Index

Intervention Type BEHAVIORAL

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on Low Glycemic Index foods.

High Glycemic Index

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on High Glycemic Index foods.

Group Type EXPERIMENTAL

High Glycemic Index

Intervention Type BEHAVIORAL

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on Low Glycemic Index foods.

Interventions

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Control

Dietary manipulation in the free-living setting to include potatoes/potato products frequently in the diet (5-7 days / week). The control diet will be prescribed for weight maintenance.

Intervention Type BEHAVIORAL

Low Glycemic Index

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on Low Glycemic Index foods.

Intervention Type BEHAVIORAL

High Glycemic Index

Diets will be energy-restricted (\~ 500 kcal deficit /d) for weight loss, will include consumption of 5-7 potatoes/week, and will focus on Low Glycemic Index foods.

Intervention Type BEHAVIORAL

Other Intervention Names

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No energy reduction Low glycemic index reduced energy High glycemic index reduced energy

Eligibility Criteria

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Inclusion Criteria

* Men and women
* ≥ 18 years of age who have a body mass index (BMI) of 25 to 35 kg/m2 (inclusive).

Exclusion Criteria

* Total cholesterol (TC) not greater than 300 mg/dL,
* Fasting triglyceride not greater than 300 mg/dL ,
* LDL cholesterol (LDL-C) not greater than 180 mg/dL,
* Smokers
* Female subjects who are pregnant or lactating
* Subjects taking any medications that would interfere with outcomes of the study
* Subjects with unusual dietary habits (eg., pica)
* Subjects who are actively losing weight or trying to lose weight
* Subjects who are addicted to drugs or alcohol or who are \< 1 y in recovery program
* Subjects who present with significant psychiatric or neurological disturbances
* Subjects with known allergy or intolerance to potato products
* Subjects with documented atherosclerotic disease, inflammatory disease, diabetes mellitus, uncontrolled hypertension ( 140/90 mm Hg), chronic lung, renal or liver disease

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes