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Showing 1–24 of 233 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Intake Clear all
Completed Phase 2 Interventional Results available

Testing Diet Intervention Versus Non-Diet Intervention for Management of Bowel Symptoms in Rectal Cancer Survivors

NCT04205955
View directory record Official record
Conditions
Rectal Carcinoma, Rectosigmoid Carcinoma
Interventions
Best Practice, Dietary Intervention, Message, Quality-of-Life Assessment, Questionnaire Administration
Other · Dietary Supplement
Lead sponsor
SWOG Cancer Research Network
Network
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
225
States / cities
Tucson, Arizona • Costa Mesa, California • Duarte, California + 144 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2024 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Acute Intake of Meals Containing Higher vs. Lower Energy From Protein on DIT

NCT06494449
View directory record Official record
Conditions
Healthy, Overweight and Obesity
Interventions
Higher protein, Lower protein
Other
Lead sponsor
Midwest Center for Metabolic and Cardiovascular Research
Other
Eligibility
18 Years to 55 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 5, 2025 · Synced Jul 21, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Pistachio Intake and Nutrition-Related Outcomes in Individuals on GLP-1 Therapy

NCT07244445
View directory record Official record
Conditions
Dietary Change, Obesity & Overweight, Food Acceptance
Interventions
Pistachios, Dual-energy X-ray absorptiometry (DEXA) scans
Dietary Supplement · Procedure
Lead sponsor
Ian J. Neeland, MD
Other
Eligibility
18 Years to 80 Years
Enrollment
108 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Clevland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Jul 21, 2026, 2:18 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Whole Egg Intake and the Mediterranean Diet

NCT02737293
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Control Diet, Med Diet, Med Diet + Whole Egg
Other
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
20 Years to 75 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 3, 2022 · Synced Jul 21, 2026, 2:18 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 Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Salty Gut: Effects of High Dietary Salt Intake on the Gut Microbiota

NCT04229680
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
High Salt, Recommended Salt
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Oct 1, 2023 · Synced Jul 21, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional

Fresh Takes!: An Evaluation of the Impact of Receiving Fresh Food Boxes

NCT06019624
View directory record Official record
Conditions
Diabetes, PreDiabetes, Food Insecurity
Interventions
Fresh Takes!
Behavioral
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
400 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effects of Exercise on Dietary Intake

NCT00943436
View directory record Official record
Conditions
Active Lifestyle Males, Inactive Lifestyle Males
Interventions
Exercise Session, Rest Session
Other
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 28, 2018 · Synced Jul 21, 2026, 2:18 PM EDT
Not listed No phase listed Observational

Impact of Physical Activity and Diet on Symptom Experience in People Living With HIV

NCT03790501
View directory record Official record
Conditions
HIV/AIDS
Interventions
No intervention
Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
4
States / cities
Birmingham, Alabama • Boston, Massachusetts • Cleveland, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2021 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Do Weight Status and the Level of Dietary Restraint Moderate the Relationship Between Package Unit Size and Food Intake?

NCT01384552
View directory record Official record
Conditions
Overweight
Interventions
Package Unit Size - Single Serving, Package Unit Size - Standard
Other
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
18 Years to 35 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Results available

Veterans Achieving Weight Loss and Optimizing Resilience-Using Protein

NCT03835416
View directory record Official record
Conditions
Prediabetes, Obesity
Interventions
Foods rich in high quality protein
Dietary Supplement
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
55 Years and older · Male only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Jul 21, 2026, 2:18 PM EDT
Recruiting No phase listed Observational

Dietary Intake and Dietary Behaviors in Adults With Sickle Cell Disease

NCT05170412
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Not listed
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 120 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Jul 21, 2026, 2:18 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

HomeStyles-Adults of Chinese Heritage

NCT06136793
View directory record Official record
Conditions
Healthy Lifestyle, Home Environment Related Disease, Cardiometabolic Disease, Systemic Inflammatory Response, Health Behavior, Dietary Habits, Physical Inactivity, Self Efficacy, Gut Microbiota, Diabetes Mellitus
Interventions
HomeStyles-China
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
30 Years to 70 Years
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Factors Affecting Caloric Regulation in Human Feeding

NCT00108784
View directory record Official record
Conditions
Obesity
Interventions
Reduced-energy-density diet
Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
20 Years to 60 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2004
U.S. locations
1
States / cities
State College, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 12, 2010 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional

Effect of Dietary Fat on Glycemic Control in Type 1 Diabetes

NCT01292590
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
High fat meal
Other
Lead sponsor
Joslin Diabetes Center
Other
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 25, 2017 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional

Breakfast Intake and Satiety Hormones

NCT02497859
View directory record Official record
Conditions
Obesity
Interventions
Egg Breakfast (EB), Cereal Breakfast (CB), Weight Loss Counseling, Weight Loss Diet
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Sep 15, 2016 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increasing the Variety of Vegetables and Fruits Served to Preschool Children at a Snack

NCT01557218
View directory record Official record
Conditions
Obesity, Feeding Behaviors
Interventions
Cucumber snack, Pepper snack, Tomato snack, Vegetable variety snack, Apple snack, Peach snack, Pineapple snack, Fruit variety snack
Other
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 6 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 14, 2013 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fruits and Vegetables Incentives Study

NCT04235413
View directory record Official record
Conditions
Obesity, Fruit and Vegetable Intake, Healthy Diet
Interventions
Real-Time Incentives Group
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years and older
Enrollment
244 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2023 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Breastfeeding in Infancy and Food Intake in Preschool-Aged Children

NCT00994487
View directory record Official record
Conditions
Childhood Obesity, Breastfeeding
Interventions
High Energy Density Preload, Low Energy Density Preload
Other
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
3 Years to 5 Years · Female only
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Jul 21, 2026, 2:18 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Trial of Pistachio Consumption in Older Adults

NCT06992544
View directory record Official record
Conditions
Cognition, Cardiometabolic Risk Factors, Life Satisfaction
Interventions
Pistachio-enriched diet, Usual diet
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
65 Years to 80 Years
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Jul 21, 2026, 2:18 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Baylor Infant and Toddler Biomarker of Nutrition Study

NCT05869760
View directory record Official record
Conditions
Healthy Nutrition, Healthy Diet
Interventions
Carotenoid Intake, Serum carotenoid concentrations
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
3 Months to 24 Months
Enrollment
208 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Fiber Snack Foods on Dietary Intake in Healthy Adults

NCT01478659
View directory record Official record
Conditions
Fructooligosaccharide
Interventions
Control study food with no added fiber, Study food with added fiber
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 50 Years
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Dec 12, 2012 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sweetened Beverages and Food Intake

NCT00475475
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Fructose, glucose, non-caloric sweetener
Behavioral
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 25 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 1, 2012 · Synced Jul 21, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Dietary Sodium Intake on Vascular Endothelium

NCT01550315
View directory record Official record
Conditions
Postural Tachycardia Syndrome (POTS)
Interventions
Pulsitile Arterial Tonometry (PAT) Protocol, Calf Blood Flow in Reactive Hyperemia (CBF-RH), Evaluation of Forearm-Mediated Dilation
Procedure · Device
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 4, 2022 · Synced Jul 21, 2026, 2:18 PM EDT