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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Change Clear all
Completed Not applicable Interventional Accepts healthy volunteers

High Quality Protein for Assisting With Weight Loss

NCT03085511
View directory record Official record
Conditions
Obesity
Interventions
Egg breakfast (EB), Weight Loss Counseling, Weight Loss Diet, Cereal Breakfast (CB)
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2019 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Giving a Low Carbohydrate Diet to Overcome Hypertension

NCT04230928
View directory record Official record
Conditions
Hypertension, African Americans, Diet, Carbohydrate-Restricted, Risk Reduction Behavior
Interventions
Very low carbohydrate diet, Standard DPP-GLB diet, Standard DPP-GLB program modules
Other · Behavioral
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years to 74 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 1, 2026 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of a Pre-Workout Dietary Supplement

NCT02952014
View directory record Official record
Conditions
Dietary Modification
Interventions
C4 Extreme, C4 Extreme (without Advantra Z, Placebo
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 40 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Nov 1, 2016 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional

Lifestyle, Eating, and Activity Patterns

NCT00944099
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Behavioral weight loss intervention
Behavioral
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
21 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 26, 2026, 2:26 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

High Fat - High Protein Diet in the Treatment of Obesity

NCT00299273
View directory record Official record
Conditions
Obesity
Interventions
Low calorie high fat/protein diet
Behavioral
Lead sponsor
Rockefeller University
Other
Eligibility
25 Years to 50 Years · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 7, 2015 · Synced Sep 26, 2026, 2:26 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Dietary Fiber: Is it the Missing Link in Achieving Long Term Behavior Change?

NCT06227494
View directory record Official record
Conditions
Obesity
Interventions
Fiber Intervention, Standard Weight Loss Education
Behavioral
Lead sponsor
Oklahoma State University
Other
Eligibility
18 Years to 65 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Stillwater, Oklahoma
Source: ClinicalTrials.gov public record
Updated Sep 28, 2025 · Synced Sep 26, 2026, 2:26 AM EDT
Recruiting Not applicable Interventional

Fermented Food-Supplemented Diet in Ulcerative Colitis

NCT04401605
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Diet Modification, Ulcerative Colitis
Interventions
Fermented Food-supplemented Diet, Regular Diet
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 26, 2026, 2:26 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Elements Vital to Treat Obesity Study

NCT04708769
View directory record Official record
Conditions
Obesity
Interventions
Smartphone App Participants (APP), Diabetes Prevention Program Participants (DPP)
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
18 Years to 70 Years
Enrollment
524 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional

Nutritional Therapy Study in Pediatric Crohn's Disease

NCT02610101
View directory record Official record
Conditions
Crohn's Disease
Interventions
Traditional SCD Diet, Modified SCD Diet, Whole foods diet
Other
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
12 Years to 21 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 23, 2019 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutricity: A Pilot Study to Improve Parental Nutrition Literacy

NCT03673267
View directory record Official record
Conditions
Dietary Habits, Dietary Modification, Literacy, Knowledge, Attitudes, Practice
Interventions
Nutricity
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 3, 2019 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

The Safety and Efficacy of Low and High Carbohydrate Diets

NCT00143936
View directory record Official record
Conditions
Obesity
Interventions
Low- Carbohydrate -Atkins Diet, Low Calorie Diet
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years to 65 Years
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
3
States / cities
Denver, Colorado • St Louis, Missouri • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 14, 2010 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Phase 3 Interventional

Internet Administration of the Modified Atkins Diet for Adults With Intractable Epilepsy

NCT00436631
View directory record Official record
Conditions
Epilepsy
Interventions
Dietary management of seizures
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 1, 2015 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Plant Based Diet, Ethnicity, and the Gut Microbiome

NCT03314194
View directory record Official record
Conditions
Diet Modification, Microbial Colonization
Interventions
Plant Based Diet
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 15, 2021 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Alpha Hope Dietary Supplement on Health and Cognitive Performance

NCT05589051
View directory record Official record
Conditions
Cognitive Change
Interventions
Drink
Dietary Supplement
Lead sponsor
University of Memphis
Other
Eligibility
40 Years to 70 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 25, 2023 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional

Study on Impact of Lifestyle Change and Weight Loss Before Bariatric Surgery

NCT00623792
View directory record Official record
Conditions
Severe Obesity, Bariatric Surgery
Interventions
Preoperative lifestyle Intervention
Behavioral
Lead sponsor
Duquesne University
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2016 · Synced Sep 26, 2026, 2:26 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

A Pilot Factorial Trial of an Integrated Lifestyle Intervention

NCT06116435
View directory record Official record
Conditions
Physical Inactivity, Overweight and Obesity
Interventions
Prevent T2, Move group-based classes, Fitness Membership, Mental Imagery, Move 1:1 Support
Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 65 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 13, 2024 · Synced Sep 26, 2026, 2:26 AM EDT
Not listed Not applicable Interventional

KIDFIT: Keeping Ideal Cardiovascular Health Family Intervention Trial

NCT03405246
View directory record Official record
Conditions
Childhood Obesity, Weight Gain, Diet Modification
Interventions
KIDFIT HEALTHY, KIDFIT SAFE
Behavioral
Lead sponsor
Northwestern University
Other
Eligibility
3 Years to 5 Years
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 4, 2022 · Synced Sep 26, 2026, 2:26 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of Dietary Nitrate on Immobilization-induced Changes in Skeletal Muscle in Young Healthy Men

NCT07161973
View directory record Official record
Conditions
Mitochondrial Energetics, Dietary Nitrate, Disuse Atrophy (Muscle) of Lower Leg
Interventions
Beetroot Juice - Active, Placebo Beetroot Juice Without Nitrate
Dietary Supplement
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 44 Years · Male only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Delicious Eating for Life in Southern Homes

NCT04302727
View directory record Official record
Conditions
Weight Loss, Diet, Healthy, Cardiovascular Risk Factor
Interventions
Med-South Weight Loss Intervention, WW
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 75 Years
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2024
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 2, 2025 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet and Sleep Monitoring

NCT03257137
View directory record Official record
Conditions
Sleep, Diet Modification
Interventions
Diet Quality
Other
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 40 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 21, 2022 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Lifestyle Interventions for Seniors With Apnea

NCT01422863
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Lifestyle Intervention
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
60 Years to 75 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 17, 2017 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolic Impact of Time Restricted Feeding

NCT03129581
View directory record Official record
Conditions
Obesity, Diet Modification
Interventions
Dietary Counseling
Behavioral
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 22, 2022 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Phase 2 Interventional

Safety and Effectiveness Study of a Fiber Supplement for Weight Loss

NCT00613600
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Glucomannan, Inert microcrystalline cellulose
Dietary Supplement
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 1, 2011 · Synced Sep 26, 2026, 2:26 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Climate Labels for Restaurant Menus Pilot

NCT06651060
View directory record Official record
Conditions
Food Selection
Interventions
Menu label
Behavioral
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
16,181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Mar 20, 2025 · Synced Sep 26, 2026, 2:26 AM EDT