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Showing 1–24 of 187 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Portion controlled diet Clear all
Recruiting Not applicable Interventional

Dementia and Diabetes Prevention Program

NCT04141878
View directory record Official record
Conditions
Diabetes, Dementia
Interventions
Aerobic Exercise, Diet Skills
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
60 Years and older
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Walnut Creek, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Replacing Energy From Solid Fats and Added Sugars (SoFAS) With Avocado

NCT04990817
View directory record Official record
Conditions
Elevated Triglycerides, Hypertriglyceridemia
Interventions
Average American Diet With SoFAS Replaced With Avocado, Average American Diet
Other
Lead sponsor
Midwest Center for Metabolic and Cardiovascular Research
Other
Eligibility
21 Years to 74 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
2
States / cities
Chicago, Illinois • Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Effects of Formula Diet on Body Weight, Body Composition, and Biomarkers for Disease Compared to a Standard Diet

NCT00138645
View directory record Official record
Conditions
Body Weight Changes
Interventions
MicroDiet, Healthy Diet
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 7, 2016 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional

The Effects of a Pre-packaged, Portion Controlled Meal Plan on Type 2 Diabetes and Glycemic Control: A Comparison Study

NCT01260337
View directory record Official record
Conditions
Obesity
Interventions
Portion controlled diet, Diabetes Support and Education
Behavioral · Other
Lead sponsor
Temple University
Other
Eligibility
21 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 30, 2013 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Building an Evidence Base for Weight Loss Strategies Among Those With Chronic SCI-The GLB-SCI+

NCT03874988
View directory record Official record
Conditions
Spinal Cord Injuries, Obesity, Weight Loss, Diet Modification
Interventions
Portion-Controlled Meals, Enhanced Self-Monitoring, GLB-SCI+
Behavioral
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 14, 2025 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Treatment of Early Childhood Overweight in Primary Care: Pilot Study

NCT01662557
View directory record Official record
Conditions
Obesity
Interventions
Family Behavior Modification, Minimal Nutrition Information
Behavioral · Other
Lead sponsor
University of Pennsylvania
Other
Eligibility
4 Years to 8 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 14, 2012 · Synced Sep 5, 2026, 10:03 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Bioavailability of Vitamin D(25(OH)D) and Omega-3 Fatty Acid (DHA) Enhanced Chicken

NCT05248737
View directory record Official record
Conditions
Nutrition, Healthy
Interventions
DHA/EPA fortified chicken plus Placebo, non-25(OH)D fortified chicken/eggs plus vitamin D3 supplement, non-DHA bio-enhanced chicken plus supplement DHA Omega-3, 25(OH)D bioenhanced chicken and eggs plus placebo, Dietary Supplement: DHA/EPA fortified eggs plus Placebo, non-DHA bio-enhanced eggs plus supplement DHA Omega-3, non-25(OH)D fortified chicken/eggs plus placebo
Dietary Supplement · Other
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 35 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Sep 5, 2026, 10:03 AM EDT
Active, not recruiting Not applicable Interventional

A Study for Cardiovascular and Lifestyle Risk Factors in Prostate Cancer Patients

NCT03127631
View directory record Official record
Conditions
Prostate Cancer, Cardiovascular Disease
Interventions
Nutrition, Exercise, Smoking cessation, Statin (such as Simvastatin, Atorvastatin, Rosuvastatin, Pravastatin), ACE inhibitor
Behavioral · Drug
Lead sponsor
McMaster University
Other
Eligibility
45 Years and older · Male only
Enrollment
5,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2026
U.S. locations
4
States / cities
Augusta, Georgia • Kansas City, Kansas • Philadelphia, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Targeting Pregnancy-related Weight Gain to Reduce Disparities in Obesity

NCT02229708
View directory record Official record
Conditions
Pregnancy, Body Weight Changes, Behavioral, Obesity
Interventions
Healthy Lifestyle Group
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years and older · Female only
Enrollment
262 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 16, 2019 · Synced Sep 5, 2026, 10:03 AM EDT
Enrolling by invitation No phase listed Observational Accepts healthy volunteers

The Effect of Adiposity on Muscle and Microvascular Function in HFpEF

NCT06930495
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction (HFPEF)
Interventions
Weight loss SOC Treatment with second generation anti-diabetic medications
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 5, 2026, 10:03 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Assessing Obesity Related Risk Factors in Adult Population: A Genetic and Behavioral Study

NCT07341841
View directory record Official record
Conditions
Obesity Prevention
Interventions
Diet and exercise, Lifestyle Intervention, Exercise
Behavioral
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 13, 2026 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Phase 1Phase 2 Interventional

Barriers to Treatment in Obese Adolescents

NCT00167830
View directory record Official record
Conditions
Obesity
Interventions
Motivational Interviewing, Strength and Cardiovascular Conditioning, Food selection and portion control
Behavioral
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
11 Years to 18 Years
Enrollment
292 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2013
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jan 19, 2014 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Results available

Trial of Low and High Intensity Strategies to Maintain BP Control

NCT00760552
View directory record Official record
Conditions
Hypertension
Interventions
High Intensity Intervention, Low Intensity Intervention, All- 6 month pharmacist intervention
Other
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years and older
Enrollment
249 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Apr 26, 2015 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Results available

Assessment of Energy Balance

NCT01678885
View directory record Official record
Conditions
Caloric Intake and Energy Metabolism
Interventions
Digital Photography of Foods, doubly labeled water, IDEEA, low-calorie diet, Actical, Sensewear Armband
Behavioral · Other · Device
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated May 30, 2017 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blackberry Polyphenol Intake and Fuel Management

NCT01932879
View directory record Official record
Conditions
Fuel Management
Interventions
Blackberry, Jello
Other
Lead sponsor
USDA Beltsville Human Nutrition Research Center
Federal
Eligibility
25 Years to 75 Years · Male only
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 6, 2016 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Functional Medicine Health Coaching

NCT05551546
View directory record Official record
Conditions
Health Promotion
Interventions
Functional Medicine Health Coaching for Elimination Diet for Elimination Diet, Self-guided Elimination Diet
Behavioral
Lead sponsor
The Institute for Functional Medicine
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Federal Way, Washington
Source: ClinicalTrials.gov public record
Updated Dec 1, 2022 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Adaptation in Polyphenol Bioavailability and Bioactivity During Long Term Exposure to Polyphenol-Rich Foods

NCT02197754
View directory record Official record
Conditions
Healthy
Interventions
Controlled diet
Other
Lead sponsor
USDA Beltsville Human Nutrition Research Center
Federal
Eligibility
25 Years to 75 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
Beltsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 15, 2015 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional

Mila Blooms Intervention Study

NCT01473342
View directory record Official record
Conditions
Childhood Cancer
Interventions
Mila Blooms
Behavioral
Lead sponsor
Duke University
Other
Eligibility
12 Years to 19 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2014
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 23, 2014 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Results available

Effect of Whole Fruit on Glycemic Control in Adults With Type 2 Diabetes

NCT03758742
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
High-Fruit Diet
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
20 Years to 70 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 5, 2026, 10:03 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Flourish: Exploring the Early Infant Gut Microbiome

NCT07333482
View directory record Official record
Conditions
Microbiota, Gut Microbiome, Eczema, Microbiome
Interventions
Tailored Recommendations, Consult Call, Educational Email Series
Dietary Supplement · Behavioral
Lead sponsor
Seeding Inc
Industry
Eligibility
0 Months to 3 Months
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Feb 23, 2026 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Phase 2Phase 3 Interventional

A Randomized Trial Comparing Two Doses of Portion-Controlled Foods Within a Primary Care Weight Loss Program

NCT00907660
View directory record Official record
Conditions
Obesity
Interventions
Weight loss counseling, Portion-Controlled Foods
Behavioral · Dietary Supplement
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 29, 2020 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Phase 4 Interventional Results available

Real World Effectiveness of Combining an Employer-based Weight Management Program With Medication for Chronic Weight Management in Employees With Obesity

NCT03799198
View directory record Official record
Conditions
Obesity
Interventions
Weight Management Program (WMP), Medication for chronic weight management (Rx)
Other · Drug
Lead sponsor
Novo Nordisk A/S
Industry
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 13, 2022 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Community Ambulation After Hip Fracture

NCT01783704
View directory record Official record
Conditions
Hip Fracture
Interventions
Nutrition, PUSH, PULSE
Dietary Supplement · Behavioral
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
60 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
4
States / cities
Farmington, Connecticut • Baltimore, Maryland • Lebanon, New Hampshire + 1 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2022 · Synced Sep 5, 2026, 10:03 AM EDT
Completed Phase 3 Interventional Results available

Epidural Anesthesia Within an Enhanced Recovery Pathway in Reducing Pain in Patients Undergoing Gynecologic Surgery

NCT02423876
View directory record Official record
Conditions
Intraoperative Complication, Malignant Female Reproductive System Neoplasm, Pain
Interventions
Epidural analgesia, Intraoperative Complication Management and Prevention, Pain Therapy
Drug · Other · Procedure
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older · Female only
Enrollment
104 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 5, 2023 · Synced Sep 5, 2026, 10:03 AM EDT