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Showing 1–24 of 77 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Isocaloric Diet Clear all
Completed Not applicable Interventional

Nutrition for Asthmatics with Obesity

NCT05222451
View directory record Official record
Conditions
Asthma, Obesity
Interventions
DGA Diet, MCT Diet, KETO Diet
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 3, 2025 · Synced Sep 5, 2026, 10:23 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Randomized Controlled Pilot Trial of DASH Feeding in Older Low Socioeconomic Adults Without Heart Failure

NCT04113291
View directory record Official record
Conditions
Heart Failure, Heart Failure With Preserved Ejection Fraction
Interventions
DASH Diet, Usual diet
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
60 Years to 74 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 4, 2020 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional

Effect of Nicotinamide Riboside on Ketosis, Fat Oxidation & Metabolic Rate

NCT06044935
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Standard Diet, Ketogenic Diet, Placebo, Nicotinamide Riboside
Other · Dietary Supplement
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effect of Metabolic State on Anxiety in Human Subjects

NCT01322243
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Dietary manipulation
Other
Lead sponsor
Rockefeller University
Other
Eligibility
20 Years to 40 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 19, 2013 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Supplements and Personal Energy Tracking Device to Promote and Maintain Healthy Weight

NCT00502658
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Dietary supplement containing vitamins, minerals, and herbs, Shakes with nutrients and herbs, Control dietary supplement, Isocaloric, isonitrogenous control shakes without herbs, Personal energy tracking tool
Behavioral
Lead sponsor
Pharmanex
Industry
Eligibility
18 Years to 65 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
1
States / cities
Provo, Utah
Source: ClinicalTrials.gov public record
Updated Mar 27, 2008 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional

Effect of Watermelon on Gut and Cardiometabolic Health

NCT06588218
View directory record Official record
Conditions
Obesity and Overweight, Dysbiosis
Interventions
Watermelon, Belvita Breakfast Sandwich + 12 oz Water
Other
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 30 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of High Carbohydrate vs. Low Carbohydrate Diet in Type 2 Diabetes

NCT04416204
View directory record Official record
Conditions
Diabetes Mellitus, Diabetes Mellitus, Type 2
Interventions
glycogen loading, No Glycogen Loading
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
30 Years to 75 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 29, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Correlational and Intervention Effects of Egg Consumption on Macular Carotenoids, Cognition, and Achievement During Childhood

NCT03521349
View directory record Official record
Conditions
Diet Habit, Cognitive Control
Interventions
Whole Egg Intervention, Egg White Control
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
7 Years to 12 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 14, 2020 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional

Efficacy and Safety of a Ketogenic Diet in Type 1 Diabetes

NCT06503809
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
Ketogenic Diet, Standard Diet
Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Calcium and Vitamin D Supplementation During Marine Corps Training

NCT02636348
View directory record Official record
Conditions
Nutrition Status, Bone Health
Interventions
Calcium/Vitamin D, Placebo
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years and older
Enrollment
380 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Parris Island, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 27, 2016 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional

Perioperative Nutritional Optimization in Head and Neck Cancer Patients

NCT04449445
View directory record Official record
Conditions
Head and Neck Cancer
Interventions
Isocaloric and iso-nitrogenous standard enteral tube feeds, Nestle IMPACT AR
Dietary Supplement
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years and older
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Probiotics on Cognition and Health

NCT02849275
View directory record Official record
Conditions
Physiological Stress, Cognition - Other
Interventions
Lactose Free 1% Milk, Probiotic Treatment
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
25 Years to 45 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 16, 2018 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Potatoes on Markers of Cardiometabolic Health

NCT03495284
View directory record Official record
Conditions
Type 2 Diabetes Mellitus, Cardiovascular Diseases
Interventions
Potato-based side dish, Refined grain-based
Dietary Supplement
Lead sponsor
Penn State University
Other
Eligibility
25 Years to 75 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 17, 2023 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Redox Imbalance and the Development of Cystic Fibrosis Diabetes

NCT02202876
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Cystic Fibrosis
Interventions
Oral Glucose Tolerance Test, High Glycemic Index Meal, Low Glycemic Index Meal, Test Soda, Fruit juice
Other
Lead sponsor
Emory University
Other
Eligibility
1 Year and older
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 5, 2026, 10:23 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effect of Isocaloric Ultra Processed Versus Unprocessed Diets on Insulin Sensitivity

NCT03189121
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 50 Years · Male only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 9, 2019 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting Phase 2 Interventional

Diet and Immune Effects Trial: DIET- A Randomized Double Blinded Dietary Intervention Study in Patients With Metastatic Melanoma Receiving Immunotherapy

NCT04645680
View directory record Official record
Conditions
Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Metastatic Melanoma, Pathologic Stage III Cutaneous Melanoma AJCC v8, Pathologic Stage IV Cutaneous Melanoma AJCC v8, Unresectable Melanoma, Stage II Melanoma, Uveal Melanoma, Mucosal Melanoma, Unresectable Clear Cell Renal Cell Carcinoma
Interventions
Dietary Intervention, Quality-of-Life Assessment, Questionnaire Administration
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting Phase 1 Interventional Accepts healthy volunteers

Low-CArbohydrate Diet and SGLT2-INhibitOr to Achieve Moderate Ketosis in Healthy Volunteers

NCT05662865
View directory record Official record
Conditions
Ketones, Metabolism
Interventions
SGLT2 inhibitor, Controlled, Adaptive Study Diet
Drug · Other
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 60 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional

PKU Protein Requirements

NCT07194993
View directory record Official record
Conditions
PKU
Interventions
Nonradioactive stable oral isotope, Test diet
Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Blueberry Intervention Study for Brain Aging

NCT05024916
View directory record Official record
Conditions
Brain Aging
Interventions
Intervention, Control
Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
65 Years to 89 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 20, 2025 · Synced Sep 5, 2026, 10:23 PM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Salt-Sensitivity and Immunity Cell Activation

NCT03753204
View directory record Official record
Conditions
High Blood Pressure, Salt; Excess, Inflammation
Interventions
Furosemide 40 mg
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 20, 2025 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Optimized Tailored Interventions in Metabolic and Lifestyle Outcomes (OPTIMAL)

NCT06605898
View directory record Official record
Conditions
Cognitive Change, Diet, Healthy, Metabolic Syndrome, Protection Against
Interventions
MIND Diet, Control Diet
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
45 Years to 64 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Recruiting Not applicable Interventional

Nutrition for Asthmatics

NCT06151405
View directory record Official record
Conditions
Asthma
Interventions
DGA Diet, MCT Diet, KETO Diet
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Sep 18, 2024 · Synced Sep 5, 2026, 10:23 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Ketogenic Dietary Patterns in Young Adults and Kidney Health

NCT05350657
View directory record Official record
Conditions
Ketogenic Diet, Kidney Injury
Interventions
Ketogenic Diet
Behavioral
Lead sponsor
University of Virginia
Other
Eligibility
20 Years to 40 Years
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced Sep 5, 2026, 10:23 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Isocaloric Dietary Interventions for Insulin Resistance and the Metabolic Syndrome

NCT01040663
View directory record Official record
Conditions
Obesity
Interventions
Dietary intervention
Other
Lead sponsor
Rockefeller University
Other
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 9, 2013 · Synced Sep 5, 2026, 10:23 PM EDT