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Showing 1–24 of 2,750 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Diet and Nutrition Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Portion Size and Energy Density of a Single Meal in Preschool Children

NCT02299531
View directory record Official record
Conditions
Feeding Behaviors
Interventions
Varying meal energy density and portion size
Other
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 6 Years
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of High Protein Weight Loss for Seniors

NCT02730988
View directory record Official record
Conditions
Obesity, Weight Loss
Interventions
Weight Stable Group
Behavioral
Lead sponsor
Wake Forest University
Other
Eligibility
65 Years to 79 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jan 22, 2019 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Cardioprotective Effects of Omega-3 Fatty Acids Supplementation in Healthy Older Subjects Exposed to Air Pollution Particles

NCT01442480
View directory record Official record
Conditions
Healthy
Interventions
Fish oil, Olive oil
Dietary Supplement
Lead sponsor
Environmental Protection Agency (EPA)
Federal
Eligibility
50 Years to 75 Years
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 7, 2025 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional

Effects of a Whole-food, Plant-based Nutrition Program on BP and Potassium in Subjects With CKD

NCT06343129
View directory record Official record
Conditions
Chronic Kidney Diseases
Interventions
Dietary education program
Behavioral
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
2
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 16, 2024 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 4 Interventional Results available

Comparing a Virtual vs. Face to Face Weight Management Program Using Phentermine for Patients With Overweight or Obesity

NCT04614545
View directory record Official record
Conditions
Obesity
Interventions
Phentermine 37.5 Mg, Dietary program, Exercise program
Drug · Behavioral
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 6, 2022 · Synced Sep 19, 2026, 9:14 PM EDT
Not listed Not applicable Interventional

Perioperative Optimization With Enhanced Recovery

NCT04504266
View directory record Official record
Conditions
Complication of Surgical Procedure
Interventions
POWER
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
368 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 14, 2024 · Synced Sep 19, 2026, 9:14 PM 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 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Reducing Chronic Kidney Disease Burden in an Underserved Population

NCT03832166
View directory record Official record
Conditions
CKD, ESRD
Interventions
Fruits and Vegetables, Cooking
Other
Lead sponsor
Baylor Research Institute
Other
Eligibility
18 Years and older
Enrollment
142 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 26, 2020 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional

Comparing Two Types of Diets on Psychological and Gastrointestinal Symptoms

NCT03035799
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Paleolithic diet, General Healthful Diet
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 3 Interventional

Nutrition Intervention in Treating Women With Breast Cancer

NCT00002564
View directory record Official record
Conditions
Breast Cancer
Interventions
educational intervention, therapeutic dietary intervention
Other · Procedure
Lead sponsor
Institute for Cancer Prevention (IFCP)
Other
Eligibility
48 Years to 78 Years · Female only
Enrollment
2,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1994 – 2006
U.S. locations
37
States / cities
Birmingham, Alabama • Tucson, Arizona • Los Angeles, California + 32 more
Source: ClinicalTrials.gov public record
Updated Sep 16, 2013 · Synced Sep 19, 2026, 9:14 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Study of Treatment and Metabolism in Patients With Urea Cycle Disorders

NCT00004307
View directory record Official record
Conditions
Amino Acid Metabolism, Inborn Errors
Interventions
Protein and calorie controlled diet, Ornithine transcarbamylase vector
Behavioral · Genetic
Lead sponsor
National Center for Research Resources (NCRR)
NIH
Eligibility
6 Months to 64 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 1999
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional

Eat Well Produce Benefit for Diabetes and Food Insecurity

NCT05896644
View directory record Official record
Conditions
Diabetes Mellitus, Food Insecurity
Interventions
Eat Well
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
2,177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Energy Drinks on Sleep and Cardiovascular Health

NCT05503732
View directory record Official record
Conditions
Healthy, Caffeine
Interventions
Energy Drink, Placebo Drink
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 14, 2024 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Community-Based Nutrition-Lifestyle Therapy for Pregnant Latina Women With Diabetes

NCT06218147
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Diabetes Mel Gestational - in Pregnancy
Interventions
Nutrition-behavior lifestyle program
Behavioral
Lead sponsor
Sansum Diabetes Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Santa Barbara, California
Source: ClinicalTrials.gov public record
Updated Apr 2, 2025 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional

Reverse HFpEF: Ketogenic Reversal of Heart Failure With Preserved Ejection Fraction Study

NCT04942548
View directory record Official record
Conditions
Heart Failure
Interventions
Ketogenic Diet
Other
Lead sponsor
National Jewish Health
Other
Eligibility
21 Years to 80 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
2
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional

The PREVENTION Trial: Precision Recommendations to Optimize Neurocognition

NCT04082611
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment
Interventions
Data-Driven Clinical Recommendations, Coached Data-Driven Clinical Recommendations
Behavioral
Lead sponsor
Saint John's Cancer Institute
Other
Eligibility
50 Years to 80 Years
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated May 14, 2025 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 3 Interventional Results available

Improving Reproductive Fitness Through Pretreatment With Lifestyle Modification in Obese Women With Unexplained Infertility

NCT02432209
View directory record Official record
Conditions
Infertility, Female
Interventions
Caloric Restriction, Orlistat, Moderate physical activity
Other · Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
379 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
10
States / cities
San Francisco, California • Augusta, Georgia • Southfield, Michigan + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2022 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 1 Interventional Results available

Effects of E-Cigarette Flavors on Adults TCORS 2.0

NCT03635333
View directory record Official record
Conditions
Nicotine Use Disorder
Interventions
Nicotine, Flavor
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 50 Years
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 2 Interventional

Survival TRaining for ENhancing Total Health (STRENGTH)

NCT00068458
View directory record Official record
Conditions
Breast Cancer, Depression, Weight Changes
Interventions
Calcium-Rich Diet, Arm 2: Exercise + Calcium-Rich Diet, Exercise + Fruit & Vegetable, Low Fat + Calcium Diet
Dietary Supplement · Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older · Female only
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
4
States / cities
Durham, North Carolina • Goldsboro, North Carolina • Winston-Salem, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 18, 2017 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of TMAO Formation With Egg Intake Versus Choline Supplement in a Healthy Population

NCT03142763
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
Eggs, Choline Supplement
Other · Dietary Supplement
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 30 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 6, 2019 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Indiana SNAP-Ed Long-term Study Sequel

NCT03436784
View directory record Official record
Conditions
Nutrient Intake Inadequacy
Interventions
Indiana SNAP-Ed
Behavioral
Lead sponsor
Purdue University
Other
Eligibility
18 Years and older
Enrollment
261 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Mar 28, 2023 · Synced Sep 19, 2026, 9:14 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Combined Antioxidant and Preeclampsia Prediction Studies (CAPPS)

NCT00135707
View directory record Official record
Conditions
Preeclampsia
Interventions
Dietary Supplement/Vitamins, Placebo for Vitamin C and Vitamin E
Drug
Lead sponsor
The George Washington University Biostatistics Center
Other
Eligibility
Female only
Enrollment
10,154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
16
States / cities
Birmingham, Alabama • Chicago, Illinois • Detroit, Michigan + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2019 · Synced Sep 19, 2026, 9:14 PM EDT
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 19, 2026, 9:14 PM EDT
Terminated Phase 2 Interventional Results available

Eosinophilic Esophagitis Clinical Therapy Comparison Trial

NCT01821898
View directory record Official record
Conditions
Eosinophilic Esophagitis
Interventions
Oral Budesonide, Elimination diet
Drug · Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
3 Years to 17 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 10, 2021 · Synced Sep 19, 2026, 9:14 PM EDT