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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Intake Clear all
Completed No phase listed Observational Accepts healthy volunteers

Barriers and Facilitators to Vegetable Intake

NCT03607526
View directory record Official record
Conditions
Overweight, Obese
Interventions
Barriers, Facilitators
Other
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Feb 1, 2022 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Protein and Insulin Sensitivity Study

NCT00508937
View directory record Official record
Conditions
Insulin Resistance, Type 2 Diabetes, Metabolic Syndrome, Cardiovascular Disease, Dyslipidemia
Interventions
Diet
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older
Enrollment
660 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
2
States / cities
Berkeley, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 22, 2020 · Synced Sep 19, 2026, 1:59 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Effect of Pumpkin Seeds on the Dietary Fatty Acid Intake and Blood Pressure in Women

NCT01928966
View directory record Official record
Conditions
Cardiovascular Disease, Blood Pressure
Interventions
Pumpkin Seeds
Other
Lead sponsor
Texas Woman's University
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Results available

Dietary Glycemic Index, Brain Function and Food Intake in Patients With Type 1 Diabetes Mellitus

NCT02772783
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
high GI meal, low GI meal, euglycemic insulin clamp, primed-variable insulin infusion
Other · Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 17, 2021 · Synced Sep 19, 2026, 1:59 PM 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 19, 2026, 1:59 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Mitopure Challenge to Detect Levels of Urolithin A in Dried Blood Spots

NCT04985630
View directory record Official record
Conditions
Healthy Aging, Healthy, Healthy Diet
Interventions
Mitopure, Pomegranate Juice
Dietary Supplement
Lead sponsor
Amazentis SA
Industry
Eligibility
18 Years to 80 Years
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Sep 19, 2026, 1:59 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

AvoCog - the Effect of Daily Avocado Intake on Cognitive Function in Older Adults

NCT06137339
View directory record Official record
Conditions
Brain Aging
Interventions
Avocado Group
Other
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
65 Years to 85 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 21, 2024 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CALERIE (PBRC, Baton Rouge) - Comprehensive Assessment of Long-Term Effects of Reducing Intake of Energy

NCT00099151
View directory record Official record
Conditions
Aging, Cardiovascular Disease, Diabetes Mellitus
Interventions
Caloric Restriction (CR), Exercise
Behavioral
Lead sponsor
National Institute on Aging (NIA)
NIH
Eligibility
25 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2006
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Dec 10, 2009 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Detection of Gut Metabolites in Mother's Milk Following Juice Intake

NCT04596254
View directory record Official record
Conditions
Healthy Diet
Interventions
Pomegranate Juice
Other
Lead sponsor
Amazentis SA
Industry
Eligibility
20 Years to 40 Years · Female only
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 21, 2023 · Synced Sep 19, 2026, 1:59 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Growing Healthy Hearts: A Pilot Randomized Control Trial to Test Gardening as an Intervention to Improve Health

NCT04207268
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
Gardening and Nutrition Advice, Nutrition Advice
Behavioral
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
20 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 21, 2022 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional

eCulinary Medicine Emphasizing Herbs/Spices to Increase Vegetable Intake

NCT05587855
View directory record Official record
Conditions
Hypertension, Diet, Healthy, Culinary Medicine
Interventions
E-group
Other
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 80 Years
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jul 24, 2024 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Toddler Tastes Study

NCT06877468
View directory record Official record
Conditions
Dietary Behavior
Interventions
Associative conditioning, Modeling
Behavioral
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Months and older
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jan 4, 2026 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Glycoxidative Stress on Human Aging

NCT00579774
View directory record Official record
Conditions
Aging
Interventions
Low AGE Diet, Regular Diet
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 35 Years
Enrollment
438 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2014 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Maximizing the Dietary Pattern of Older Adults: the Effects of Protein Intake on Protein Kinetics

NCT04830514
View directory record Official record
Conditions
Sarcopenia
Interventions
Recommended Dietary Allowance of Protein, Habitual protein intake, Optimal Protein Intake
Other
Lead sponsor
University of Arkansas
Other
Eligibility
50 Years to 70 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Aug 23, 2023 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of the DASH Diet Containing Meat on Muscle and Metabolic Health in Older Adults

NCT04127240
View directory record Official record
Conditions
Obesity, Sarcopenia, Aging
Interventions
DASH diet containing daily intakes of red meat
Other
Lead sponsor
South Dakota State University
Other
Eligibility
65 Years and older
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Brookings, South Dakota
Source: ClinicalTrials.gov public record
Updated Oct 14, 2019 · Synced Sep 19, 2026, 1:59 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Increased Dietary Protein Intake During GLP-1 Medication Use (in Middle-aged Women With Overweight/Obesity)

NCT07480109
View directory record Official record
Conditions
Obesity, Women (Between 30 to 60 Years Old)
Interventions
Protein Rich Foods
Behavioral
Lead sponsor
University of Texas at Austin
Other
Eligibility
30 Years to 60 Years · Female only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
2
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

MiCrobiome dieT Study

NCT03610477
View directory record Official record
Conditions
Healthy
Interventions
Medium chain triglycerides, Long chain triglycerides
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Exercise Training and Time-restricted Feeding in Overweight and Obese Adults

NCT03823872
View directory record Official record
Conditions
Overweight and Obesity, Weight Loss
Interventions
Time restricted feeding, Normal feeding
Other
Lead sponsor
Kyle Hackney
Other
Eligibility
35 Years to 60 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Fargo, North Dakota
Source: ClinicalTrials.gov public record
Updated Aug 24, 2020 · Synced Sep 19, 2026, 1:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Milk Intervention Study for Brain Aging

NCT02957422
View directory record Official record
Conditions
Brain Aging
Interventions
1% Milk, Control
Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
60 Years to 89 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 18, 2021 · Synced Sep 19, 2026, 1:59 PM EDT
Recruiting Not applicable Interventional

Improving Sleep, Decision-Making, and Eating in Adolescents With Obesity

NCT06745570
View directory record Official record
Conditions
Adolescent Overweight, Adolescent Obesity, Sleep, Eating Behaviors, Dietary Intake
Interventions
Lifestyle Modification and Sleep Intervention
Behavioral
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
14 Years to 18 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jul 19, 2026 · Synced Sep 19, 2026, 1:59 PM EDT
Enrolling by invitation Not applicable Interventional

Breath Hydrogen and Methane as Biomarkers of Fiber Intake

NCT07375329
View directory record Official record
Conditions
Healthy Eating
Interventions
Breath Tester
Other
Lead sponsor
University of Oklahoma
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 19, 2026, 1:59 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Daily Beef Intake, as a Component of a Heart-Healthy Diet on Cellular Zinc

NCT05236374
View directory record Official record
Conditions
Zinc Deficiency, Inflammation, Metabolic Diseases, Vascular Diseases
Interventions
Beef protein
Other
Lead sponsor
University of California, Davis
Other
Eligibility
55 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 8, 2026 · Synced Sep 19, 2026, 1:59 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Developing Biomarkers of Dietary Intake: Dose Dependent Measurement of Sugar Intake

NCT04799301
View directory record Official record
Conditions
Diet Therapy, Healthy Volunteers
Interventions
Diet with no soda, Diet with 50% of carb intake from soda, Diet with 20% of carb intake from soda
Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 19, 2026, 1:59 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 Aug 12, 2026 · Synced Sep 19, 2026, 1:59 PM EDT