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Showing 1–24 of 45 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Healthy high carbohydrate diet Clear all
Not listed Not applicable Interventional

Effect of Diet on Gulf War Illness

NCT02881944
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Low FODMAP Diet, High FODMAP Diet
Behavioral
Lead sponsor
Ashok Tuteja
Federal
Eligibility
25 Years to 90 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 31, 2018 · Synced Sep 27, 2026, 7:17 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Smart Underwear to Measure Diet-Induced Hydrogen Sulfide Production

NCT06802276
View directory record Official record
Conditions
Hydrogen Sulfide, Gastrointestinal Microbiome
Interventions
High Cysteine Diet, Low Cysteine Diet
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Not yet recruiting Not applicable Interventional

Ketogenic Diet to Reduce Osteoarthritis Pain in MCI

NCT07417891
View directory record Official record
Conditions
Osteoarthritis (OA) of the Hip, Osteoarthritis (OA) of the Knee, Osteoarthritis (OA) of the Shoulder, Osteoarthritis, Mild Cognitive Impairment, MCI, Mild Cognitive Impairment (MCI), Dementia
Interventions
Well-formulated ketogenic diet
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
55 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Fairway, Kansas
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Active, not recruiting Not applicable Interventional

Evaluating the Influence of Diet-induced Weight Loss on Fat (Adipose) Tissue's Insulin Sensitivity and Testosterone Synthesis in Women With Overweight or Obesity, Insulin Resistance, and Hyperandrogenemia

NCT06998238
View directory record Official record
Conditions
Overweight and Obesity, Hyperandrogenemia, Insulin Resistance
Interventions
Mediterranean-based, carbohydrate restricted, calorie reduced diet
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Think AHEAD (A Healthy Eating And Drinking) Study

NCT01044134
View directory record Official record
Conditions
Obesity
Interventions
Dietary counseling
Behavioral
Lead sponsor
Boston Children's Hospital
Other
Eligibility
12 Years to 17 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Fructose on Blood Fats in Dialysis Patients and Healthy Volunteers

NCT00234156
View directory record Official record
Conditions
End-stage Renal Disease
Interventions
oral fructose and high fat diet
Procedure
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 75 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2009
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 10, 2012 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Soluble Corn Fiber on Gastrointestinal Tolerance and Fecal Microbiome in Healthy Children

NCT05213494
View directory record Official record
Conditions
Gastrointestinal Tolerance
Interventions
Inulin, soluble corn fiber
Other
Lead sponsor
Tate & Lyle
Industry
Eligibility
3 Years to 9 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 27, 2022 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional

Energy Metabolism and Cognitive Aging

NCT00777010
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Ketogenic diet, Healthy high carbohydrate diet
Other
Lead sponsor
University of Cincinnati
Other
Eligibility
50 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2017
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 23, 2017 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Nitrate-rich Fruit and Vegetable Supplement on Blood Pressure

NCT03486145
View directory record Official record
Conditions
High Blood Pressure, Flow Mediated Dilation
Interventions
fruit and vegetable juice supplement, Placebo
Dietary Supplement
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 40 Years
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 2, 2018 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Results available

Targeting Obesity to Optimize Health in Cardiac Rehab (TOPCARE)

NCT03423238
View directory record Official record
Conditions
Obesity, Weight Loss, CHD - Coronary Heart Disease
Interventions
Exercise, Health Education, Exercise Compliance, Calorie-Restricted Diet, Behavioral Modification, Weight-Loss Compliance, Dietary Counseling
Other · Behavioral · Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
40 Years and older
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 22, 2021 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional

Sip and Snack Better (SSB) Study: Improving Added Sugar in Adolescents

NCT07027865
View directory record Official record
Conditions
Dietary Habits, Diet, Healthy
Interventions
Sip & Snack Better (SSB) Intervention, Sip & Snack Better (SSB) Tech-Only Comparison
Behavioral · Other
Lead sponsor
Temple University
Other
Eligibility
12 Years to 16 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Small Bowel Microbiota Characterization in Healthy Individuals Before and After Consumption of a Western Diet

NCT03266536
View directory record Official record
Conditions
Small Intestine Bacteria
Interventions
Western diet
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 3, 2022 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Lipoprotein Effects of Substituting Beef Protein for Carbohydrate

NCT00852267
View directory record Official record
Conditions
Healthy, Cardiovascular Disease, Atherogenic Dyslipidemia
Interventions
High Carbohydrate, High Saturated Fat Diet, Low Carbohydrate, High Saturated Fat Diet, Low Carbohydrate, Low Saturated Fat Diet
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older · Male only
Enrollment
67 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Dec 23, 2020 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Reducing Dietary Added-Sugar Consumption During the Transition to College

NCT05823597
View directory record Official record
Conditions
Dietary Added Sugar Consumption
Interventions
Sugar Intensive Treatment, General Health Control
Behavioral
Lead sponsor
Arizona State University
Other
Eligibility
18 Years and older
Enrollment
702 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 20, 2023 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mediterranean-like Unprocessed (CLEAN-MED) Diet Intervention Study of the Gut Microbiome of Healthy Adults

NCT05411120
View directory record Official record
Conditions
Diet Therapy
Interventions
Western Diet, CLEAN-MED
Other
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 60 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 5, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Role of Peanuts in Healthy Weight Gain in Athletic Individuals

NCT05426109
View directory record Official record
Conditions
Weight Gain
Interventions
Peanut snacks, No peanut-containing snacks
Other
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
18 Years to 40 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Blacksburg, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 9, 2025 · Synced Sep 27, 2026, 7:17 PM EDT
Recruiting Not applicable Interventional

Carbohydrate Beta Cell Function and Glucose Control in Children With Diabetes

NCT05899166
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
Ketogenic diet, food delivery and education, Standard diet, food delivery and education
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
5 Years to 12 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 23, 2025 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Beneficial Effects of Healthy Snacks on Appetite Control, Satiety, and Reward-driven Eating Behavior in Young People

NCT01781286
View directory record Official record
Conditions
Obesity
Interventions
High Protein, Low Protein
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
13 Years to 19 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 22, 2018 · Synced Sep 27, 2026, 7:17 PM EDT
Not yet recruiting Phase 4 Interventional

Evaluating an Innovative Tobacco Treatment Approach for Veterans in Substance Use Treatment

NCT07809854
View directory record Official record
Conditions
Cigarette Smoking, Veterans
Interventions
Healthy Changes Nicotine Replacement Therapy (NRT), Cessation Treatment Nicotine Replacement Therapy (NRT), Cessation Treatment Counseling, Healthy Changes Counseling
Drug · Behavioral
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2031
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Prevention of NAFLD in Hispanic Children

NCT05292352
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease
Interventions
LFSD
Behavioral
Lead sponsor
Emory University
Other
Eligibility
6 Years to 9 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Effect of Prehabilitation on Surgical Outcomes of Abdominally-based Plastic Surgery Procedures

NCT04787874
View directory record Official record
Conditions
Ventral Hernia, Panniculus, Abdominoplasty, Flap Reconstruction
Interventions
Prehabilitation Program
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
19 Years and older
Enrollment
520 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
2
States / cities
San Jose, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated Dec 14, 2021 · Synced Sep 27, 2026, 7:17 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Oxalate-Driven Host Responses in Kidney Stone Disease

NCT05417568
View directory record Official record
Conditions
Kidney Stones
Interventions
Low Oxalate Diet, High Oxalate Diet
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 60 Years
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated May 14, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Mobile Regulation of Craving Training (mROC-T) to Improve Dietary Intake in Rural Adolescent Girls

NCT06723028
View directory record Official record
Conditions
Obesity and Type 2 Diabetes, Diet Modification
Interventions
Regulation of craving training
Behavioral
Lead sponsor
University of Wyoming
Other
Eligibility
15 Years to 18 Years · Female only
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Laramie, Wyoming
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 27, 2026, 7:17 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Prebiotic Sodas on Satiety and Metabolic Responses in Healthy Men

NCT07105826
View directory record Official record
Conditions
Olipop, Poppi, Coca Cola - Classic, Diet Coke
Interventions
Prebiotic Soda 1, Prebiotic Soda 2, Diet Soda, Regular Coke
Other
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Sep 27, 2026, 7:17 PM EDT