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Showing 1–24 of 292 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Calorie Restriction Clear all
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Calorie Restriction and Changes in Body Composition, Disease, Function, and Quality of Life in Older Adults

NCT00955903
View directory record Official record
Conditions
Obesity, Diabetes, Hypertension, Hyperlipidemia
Interventions
Exercise, Reduced Calorie Diet, Weight Maintenance Diet
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
65 Years and older
Enrollment
167 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 4, 2017 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional

Metabolism of Low Carbohydrate and Ketogenic Diet

NCT05071287
View directory record Official record
Conditions
Diabetic Kidney Disease, Cognitive Function, Weight Loss, Diabetic Control, Type2 Diabetes
Interventions
mHealth + low-fat diet, mHealth + low-carb/ketogenic diet
Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
2
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Feb 20, 2025 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Exogenous Ketones on Indices of Keto-Adaptation in Obese Subjects on Weight Reducing Diets.

NCT06449287
View directory record Official record
Conditions
Ketogenic Diet, Weight Loss
Interventions
Diet, Blood Draw, Ketone/Glucose Monitoring, Body Composition, Urine Analysis, Neuropsychological Measures - ANAM
Other · Biological · Behavioral
Lead sponsor
Ohio State University
Other
Eligibility
21 Years to 65 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

CALERIE: Comprehensive Assessment of Long-Term Effects of Reducing Intake of Energy

NCT00427193
View directory record Official record
Conditions
Aging
Interventions
Caloric Restriction (CR), Control
Behavioral
Lead sponsor
Duke University
Other
Eligibility
21 Years to 50 Years
Enrollment
238 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
3
States / cities
Baton Rouge, Louisiana • Boston, Massachusetts • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 15, 2022 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Phase 2 Interventional

Reduction of Triglycerides in Women on Hormone Replacement Therapy

NCT00023543
View directory record Official record
Conditions
Cardiovascular Diseases, Atherosclerosis, Postmenopause, Heart Diseases
Interventions
Diet, fat-restricted, Exercise
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
52 Years to 60 Years · Female only
Enrollment
508 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2010
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 18, 2013 · Synced Sep 2, 2026, 7:24 PM EDT
Terminated Phase 3 Interventional Results available

Effect of Weight and Insulin Sensitivity on Reproductive Function in PCOS

NCT01482286
View directory record Official record
Conditions
Polycystic Ovary Syndrome
Interventions
Metformin, Dietary Restriction, Exercise Training
Drug · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
20 Years to 40 Years · Female only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Mar 14, 2022 · Synced Sep 2, 2026, 7:24 PM EDT
Withdrawn Not applicable Interventional

Comparison of the Effect of Intense-Exercise/Moderate-Calorie, Topiramate-Phentermine and Cognitive Behavioral Therapy on Obesity

NCT01970566
View directory record Official record
Conditions
Obesity, Diabetes Mellitus
Interventions
Behavioral and Drug, Behavioral
Other
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
20 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
North Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 14, 2014 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Results available

The Influence of Time-Restricted Eating in Patients With Metabolic Syndrome

NCT04057339
View directory record Official record
Conditions
Metabolic Syndrome, Pre-Diabetes
Interventions
Time Restricted Eating + Standard of Care, Standard of Care
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 75 Years
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Active, not recruiting Not applicable Interventional

Pilot Study of a Metabolic Nutritional Therapy for the Management of Primary Brain Tumors

NCT01535911
View directory record Official record
Conditions
Glioblastoma
Interventions
Energy restricted Ketogenic Diet (ERKD) (Metabolic Nutritional Therapy)
Other
Lead sponsor
Michigan State University
Other
Eligibility
18 Years to 90 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2027
U.S. locations
1
States / cities
East Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 4, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional

Well-Formulated Ketogenic Diet Polycystic Kidney Disease

NCT06325644
View directory record Official record
Conditions
Polycystic Kidney Disease
Interventions
Ketogenic Diet, Ketone/Glucose Monitoring, CGM/CKM, Blood Draw, Body Composition, Change in glomerular filtration rate (mg/mmol) via magnetic resonance imaging (MRI) .
Other · Biological
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sustainability of MOVE UP Lifestyle Intervention

NCT03963830
View directory record Official record
Conditions
Body Weight, Diet, Healthy, Physical Disability
Interventions
MOVE UP
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
60 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 1, 2021 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Phase 2 Interventional Results available

Sex-related Differences in Arterial Stiffness in Type 2 Diabetics: Role of Uric Acid

NCT03648996
View directory record Official record
Conditions
Diabetes Mellitus, Type 2, Hyperuricemia
Interventions
Low-fructose diet, isocaloric, Allopurinol, Placebo, Low-fructose, hypocaloric
Other · Drug
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
40 Years to 75 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 2, 2023 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Early Time Restricted Eating on Muscle Performance in Resistance Trained Individuals

NCT05908201
View directory record Official record
Conditions
Time Restricted Eating
Interventions
early time restricted eating
Behavioral
Lead sponsor
University of Mississippi, Oxford
Other
Eligibility
18 Years to 50 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
University, Mississippi
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional

Calorie Restriction and Brain Function in Mild Cognitive Impairment

NCT03872375
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Meal-Replacement Therapy, Dietary Counseling
Dietary Supplement · Behavioral
Lead sponsor
Iowa State University
Other
Eligibility
70 Years to 85 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
2
States / cities
Ames, Iowa • Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 30, 2022 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Personalized Nutrition Study

NCT04145466
View directory record Official record
Conditions
Weight Loss
Interventions
High-fat diet, High-carbohydrate diet
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 75 Years
Enrollment
145 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 29, 2025 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bitter Taste and Weight Loss in Women

NCT01856660
View directory record Official record
Conditions
Obesity, Weight Loss
Interventions
Low-Carbohydrate Diet, Low-fat Diet
Behavioral
Lead sponsor
Rutgers University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
107 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 23, 2021 · Synced Sep 2, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Nighttime Synchrony of Your Nutrition and Circadian Health

NCT07329283
View directory record Official record
Conditions
Sleep, Metabolism Changes, Circadian Rhythm, Lifestyle Factors, Sleep Hygiene, Sleep Hygiene, Inadequate, Sleep Deprivation, Insufficient Sleep, Circadian Misalignment, Circadian Dysregulation, Light Exposure
Interventions
Central Clock Misalignment, Peripheral Misalignment
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years to 35 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2031
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Protein and Polycystic Ovary Syndrome (PCOS)

NCT07158723
View directory record Official record
Conditions
Polycystic Ovary Syndrome (PCOS)
Interventions
Higher protein dietary pattern, Calorie restriction
Other
Lead sponsor
University of Arkansas, Fayetteville
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Sep 2, 2026, 7:24 PM EDT
Recruiting Phase 2 Interventional

Milk Thistle Clinical Trial in Pediatric NAFLD

NCT06477146
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease (NAFLD)
Interventions
Milk thistle (MT), Placebo, Lifestyle Modification, Fibroscan
Drug · Behavioral · Device
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
9 Years to 22 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Terminated Not applicable Interventional

Ketogenic Diet With Chemoradiation for Lung Cancer (KETOLUNG)

NCT01419587
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
Ketogenic diet
Dietary Supplement
Lead sponsor
University of Iowa
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2017
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jan 7, 2018 · Synced Sep 2, 2026, 7:24 PM EDT
Not listed Not applicable Interventional

Time Restricted Eating (TRE) Among Endometrial Cancer Patients

NCT04783467
View directory record Official record
Conditions
Endometrial Cancer
Interventions
Time Restricted Eating (TRE) Schedule
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
18 Years and older · Female only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Nov 29, 2023 · Synced Sep 2, 2026, 7:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

The Safety and Efficacy of Low and High Carbohydrate Diets

NCT00143936
View directory record Official record
Conditions
Obesity
Interventions
Low- Carbohydrate -Atkins Diet, Low Calorie Diet
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years to 65 Years
Enrollment
360 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
3
States / cities
Denver, Colorado • St Louis, Missouri • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 14, 2010 · Synced Sep 2, 2026, 7:24 PM EDT
Active, not recruiting Not applicable Interventional

Evaluating the Influence of Diet-induced Weight Loss on Fat (Adipose) Tissue's Insulin Sensitivity and Testosterone Synthesis in Women With Overweight or Obesity, Insulin Resistance, and Hyperandrogenemia

NCT06998238
View directory record Official record
Conditions
Overweight and Obesity, Hyperandrogenemia, Insulin Resistance
Interventions
Mediterranean-based, carbohydrate restricted, calorie reduced diet
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 45 Years · Female only
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 2, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional

Ketogenic Diets for Weight Loss Maintenance: Impact on Energy Expenditure and Appetite in Individuals With Obesity

NCT06736028
View directory record Official record
Conditions
Obesity
Interventions
Diet Therapy, Calorie Restriction, Behavioral Support
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Sep 2, 2026, 7:24 PM EDT