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Showing 1–24 of 2,045 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Diet Therapy Clear all
Terminated Early Phase 1 Interventional Results available

Effect of a Low FODMAP Diet on SIBO Breath Test Positivity

NCT04627727
View directory record Official record
Conditions
SIBO
Interventions
low FODMAP diet
Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 3, 2025 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Phase 2 Interventional

N-Acetylcysteine and Milk Thistle for Treatment of Diabetic Nephropathy

NCT00915200
View directory record Official record
Conditions
Diabetic Nephropathies, Proteinuria, Oxidative Stress
Interventions
N-acetylcysteine, silibin, high-dose silibin, N-acetylcysteine placebo, silibin placebo
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 70 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 26, 2016 · Synced Sep 10, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Food and Circadian Timing

NCT04743271
View directory record Official record
Conditions
Diet, High-Fat, Circadian Rhythm
Interventions
High-Fat Diet, Low-Fat Diet
Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional

Determinants of Fat Malabsorption After Roux-en-Y Gastric Bypass

NCT01252511
View directory record Official record
Conditions
Severe Obesity
Interventions
RYGB for surgical treatment of severe obesity
Procedure
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated May 16, 2019 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Phase 2 Interventional

Calcium Supplements for Bone Health in Juvenile Rheumatoid Arthritis

NCT00000429
View directory record Official record
Conditions
Juvenile Rheumatoid Arthritis
Interventions
Calcium carbonate
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
6 Years to 18 Years
Enrollment
192 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2001
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 31, 2013 · Synced Sep 10, 2026, 5:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Prevention of Postoperative Nausea and Vomiting After Bariatric Surgery

NCT04644445
View directory record Official record
Conditions
Bariatric Surgery Candidate, Postoperative Nausea and Vomiting, Morbid Obesity
Interventions
Bariatric Full Liquid Diet
Dietary Supplement
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
112 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 8, 2020 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feasibility of Egg-Based Diet Interventions and Assessing Perinatal Mental Health

NCT05619445
View directory record Official record
Conditions
Depression, Anxiety, Stress
Interventions
Whole Liquid Egg, Plant-based Egg Substitute
Other
Lead sponsor
University of Idaho
Other
Eligibility
19 Years and older · Female only
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Moscow, Idaho
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Sep 10, 2026, 5:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Impact of Foods on Bile Acids, Metabolites, and Inflammation

NCT05245357
View directory record Official record
Conditions
Inflammation, Hypertriglyceridemia, Metabolic Disease, Lipid Metabolism Disorder, Hyperlipidemias, Bile Acid Malabsorption
Interventions
Lentil, Control
Behavioral
Lead sponsor
Montana State University
Other
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

iSIPsmarter: An RCT Evaluating the Efficacy of a Technology-Based Intervention to Reduce Sugary Drinks in Rural Appalachia

NCT05030753
View directory record Official record
Conditions
Diet Habit, Sugar-Sweetened Beverages
Interventions
iSIPsmarter, Patient Education (PE)
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 110 Years
Enrollment
249 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 21, 2025 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Phase 1Phase 2 Interventional

The University of Michigan OWL (Online Wellness and Lifestyle) Study

NCT05010083
View directory record Official record
Conditions
Obesity
Interventions
diet and lifestyle program
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 25 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 23, 2022 · Synced Sep 10, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional

The MIND-BC Study: MIND Diet for Breast Cancer Cognition

NCT07018986
View directory record Official record
Conditions
Breast Cancer
Interventions
MIND Diet, Usual Diet
Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet, Exercise and/or Rosiglitazone for HIV-Associated Insulin Resistance

NCT00264251
View directory record Official record
Conditions
HIV Infections, Insulin Resistance, Obesity
Interventions
Weight loss through diet and exercise, Rosiglitazone insulin sensitizing agent
Behavioral · Drug
Lead sponsor
St. Luke's-Roosevelt Hospital Center
Other
Eligibility
20 Years to 60 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 28, 2007 · Synced Sep 10, 2026, 5:11 AM EDT
Completed No phase listed Observational

Case-Control Study of Renal Cell Cancer Among Caucasions and African Americans in the United States

NCT00340457
View directory record Official record
Conditions
Kidney Cancer, Renal Cell Carcinoma
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
20 Years to 79 Years
Enrollment
2,424 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2016
U.S. locations
2
States / cities
Chicago, Illinois • Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 30, 2020 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Results available

Weight Management for Adolescents With IDD

NCT02561754
View directory record Official record
Conditions
Developmental Disabilities, Weight Loss, Body Weight, Down Syndrome, Body Weight Changes, Intellectual Disability
Interventions
Enhanced Stop Light Diet (eSLD), Conventional Diet (CD), Face-to-face (FTF), Technology (TECH), iPad with FaceTime
Dietary Supplement · Behavioral · Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
13 Years to 21 Years
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
2
States / cities
Kansas City, Kansas • Lawrence, Kansas
Source: ClinicalTrials.gov public record
Updated Feb 9, 2023 · Synced Sep 10, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Weight Loss Through Mayo Clinic Diet

NCT06862375
View directory record Official record
Conditions
Obesity
Interventions
Mayo Clinic Diet, Usual Care
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 64 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 6, 2025 · Synced Sep 10, 2026, 5:11 AM EDT
Recruiting Not applicable Interventional

Groceries Plus Multi-Component Lifestyle Intervention for Adults With Hypertension and Type 2 Diabetes

NCT06921356
View directory record Official record
Conditions
Hypertension, Type 2 Diabetes Mellitus (T2DM)
Interventions
Coach-Directed Tailored DASH Groceries Plus Lifestyle Intervention, Self-Shopping DASH diet advice
Behavioral
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 23, 2026 · Synced Sep 10, 2026, 5:11 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Urine pH and Diet Net Acid Load

NCT02116595
View directory record Official record
Conditions
Healthy
Interventions
high or low acid diet
Other
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 26, 2017 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Tailored Interventions to Prevent Substance Abuse

NCT01482975
View directory record Official record
Conditions
Prevention Harmful Effects
Interventions
Tailored computer based intervention, Tailored computer intervention
Other
Lead sponsor
University of Rhode Island
Other
Eligibility
10 Years to 14 Years
Enrollment
4,158 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Kingston, Rhode Island
Source: ClinicalTrials.gov public record
Updated May 11, 2016 · Synced Sep 10, 2026, 5:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Blood Pressure Response to Sodium in the Diet

NCT01899495
View directory record Official record
Conditions
Hypertension
Interventions
High sodium diet and low sodium diet
Other
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 70 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2021
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Oct 17, 2016 · Synced Sep 10, 2026, 5:11 AM EDT
Completed No phase listed Observational

Bariatric Surgery and Weight Loss on Energy Metabolism and Insulin Sensitivity

NCT00936130
View directory record Official record
Conditions
Obesity, Protein-energy; Imbalance, Insulin Sensitivity, Gastrointestinal Complication
Interventions
Laparoscopic Roux-en-Y gastric bypass, Laparoscopic gastric banding, Laparoscopic sleeve gastrectomy, Low Calorie Diet
Procedure · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 3, 2015 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional

Families Improving Together (FIT) for Weight Loss

NCT01796067
View directory record Official record
Conditions
Overweight, Obese
Interventions
Motivational and Family Weight Loss, Basic Health Education, Online Intervention, Online Control
Behavioral
Lead sponsor
University of South Carolina
Other
Eligibility
11 Years to 16 Years
Enrollment
241 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Apr 21, 2019 · Synced Sep 10, 2026, 5:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of the Optifast Program Compared With a Reduced-energy Food Based Diet Plan on Body Weight

NCT02635698
View directory record Official record
Conditions
Obesity
Interventions
Optifast, Food-Based
Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
18 Years to 70 Years
Enrollment
330 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
9
States / cities
Anchorage, Alaska • Schaumburg, Illinois • Ann Arbor, Michigan + 6 more
Source: ClinicalTrials.gov public record
Updated Nov 12, 2017 · Synced Sep 10, 2026, 5:11 AM EDT
Not listed Not applicable Interventional

Effectiveness of Atkins Diet for Weight Loss

NCT00006193
View directory record Official record
Conditions
Obesity
Interventions
diet
Behavioral
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 10, 2026, 5:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Natural Experiment Evaluating the Effect of a Minimum Wage Increase on Obesity and Diet-related Outcomes

NCT03962712
View directory record Official record
Conditions
Obesity, Nutrition Poor
Interventions
Increase Minimum Wage to $15-an-hour, No Increase in Minimum Wage
Other
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years and older
Enrollment
974 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 20, 2023 · Synced Sep 10, 2026, 5:11 AM EDT