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Showing 1–24 of 95 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Protein-Calorie Restriction Clear all
Recruiting Not applicable Interventional

Healthy Lifestyles for Bipolar Disorder

NCT06188754
View directory record Official record
Conditions
Time Restricted Eating, Diet, Mediterranean
Interventions
Time restricted eating, Mediterranean diet
Behavioral
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Aug 3, 2026 · Synced Sep 4, 2026, 5:14 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Low-calorie Diet in Isolated Impaired Fasting Glucose

NCT06451055
View directory record Official record
Conditions
Isolated Impaired Fasting Glucose
Interventions
Low-calorie diet, Routine dietary and physical activity habits
Behavioral
Lead sponsor
Emory University
Other
Eligibility
35 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 4, 2026, 5:14 PM EDT
Terminated Not applicable Interventional

Reducing Insulin, Growth Hormones, and Tumors

NCT03785808
View directory record Official record
Conditions
Diet Modification, Lung Cancer
Interventions
Special Diet Therapy (low-carb), Special Diet Therapy (low-fat), Special Diet Therapy (USDA control)
Behavioral
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 11, 2019 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Continuous vs. Intermittent Caloric Restriction on Fat Los

NCT06079658
View directory record Official record
Conditions
Obesity
Interventions
Continuous Caloric Restriction versus Intermittent Caloric Restriction on Fat Loss
Behavioral
Lead sponsor
Coastal Carolina University
Other
Eligibility
18 Years to 65 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Conway, South Carolina
Source: ClinicalTrials.gov public record
Updated Oct 11, 2023 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Calorie Restricted, Very Low Fat Plant-based Diet and Multi-component Exercise Program on Metabolic Health

NCT02706288
View directory record Official record
Conditions
Obesity, Insulin Resistance
Interventions
Weight loss with very low fat plant-based diet and regular exercise
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 55 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 7, 2022 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Results available

(R33 Phase) DELISH Study: Diabetes Education to Lower Insulin, Sugars, and Hunger

NCT03837405
View directory record Official record
Conditions
Type 2 Diabetes Mellitus
Interventions
Carbohydrate-restricted diet, Mindfuless
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 16, 2026 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional

Dietary Restriction in Vascular Surgery

NCT04013412
View directory record Official record
Conditions
Vascular Diseases, Surgery
Interventions
Protein-Calorie Restriction
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 4, 2026, 5:14 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effect of Dietary and Life Style Modification on Post Liver Transplant Obesity

NCT00878592
View directory record Official record
Conditions
Post Liver Transplantation Weight Gain, Post Liver Transplantation Obesity, Nonalcoholic Steatohepatitis
Interventions
Dietary and life style modification
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2008
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 9, 2017 · Synced Sep 4, 2026, 5:14 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Ketone Conferred Resiliency Against Sleep Restriction With Nutritional Intervention.

NCT06075914
View directory record Official record
Conditions
Sleep Deprivation, Nutritional Intervention
Interventions
Ketogenic Intervention, Mediterranean Intervention, Placebo, Ketone Ester
Other · Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 40 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Sep 4, 2026, 5:14 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Tirzepatide: Reversal of Lipotoxicity and Adipose Tissue Dysfunction in Humans With Overweight/Obesity

NCT05912621
View directory record Official record
Conditions
Obesity, Overweight and Obesity, Overweight
Interventions
Tirzepatide
Drug
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 70 Years
Enrollment
66 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2029
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Sep 4, 2026, 5:14 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 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional

A Low-Carbohydrate Diabetes Prevention Program

NCT03258918
View directory record Official record
Conditions
PreDiabetes
Interventions
Low-Carbohydrate Diabetes Prevention Program
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 11, 2018 · Synced Sep 4, 2026, 5:14 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 4, 2026, 5:14 PM EDT
Not listed Not applicable Interventional

UCLA Breast Cancer Survivor Health Promotion Research Study

NCT05113485
View directory record Official record
Conditions
Breast Cancer
Interventions
Diabetes Prevention Program-based lifestyle change intervention (DPP), Highly Microbiota-Accessible Foods (HMAFs) intervention
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
50 Years to 75 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 10, 2022 · Synced Sep 4, 2026, 5:14 PM EDT
Recruiting Not applicable Interventional

Ketogenic Diet vs Mixed Diet in Patients With Heart Failure

NCT06081543
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction
Interventions
Ketogenic diet, Low-fat Mixed diet
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 80 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Characterization of Bile Acid Pathway in Obesity

NCT03341052
View directory record Official record
Conditions
Obesity
Interventions
Normal Diet, High Fat Diet, Low Fat Diet
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Apr 26, 2023 · Synced Sep 4, 2026, 5:14 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 4, 2026, 5:14 PM EDT
Withdrawn Not applicable Interventional

Short-Term Endogenous Hydrogen Sulfide Upregulation For Vein Graft Disease

NCT05457881
View directory record Official record
Conditions
Vascular Diseases, Surgery
Interventions
Scandi-Shake
Dietary Supplement
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 17, 2025 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional

Effects of Diet and Exercise on Ductal Carcinoma in Situ

NCT02224807
View directory record Official record
Conditions
Ductal Carcinoma In Situ, Breast Cancer
Interventions
Active Comparator: Progressive Resistance Training (PRT) and a healthy diet, Experimental: PRT and a healthy diet, plus weight loss
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older · Female only
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 30, 2018 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional

UC Cohort - The Influence of Diet on Gut Microbiotas

NCT04933162
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
High Protein and Low Fiber Diet, Low Protein and High Fiber Diet
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 24, 2023 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional

Exercise and Nutrition on Obese Microbiome

NCT04138303
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Exercise Protocol, Calorie-Restrictive Low Carbohydrate Diet (CR-LC), Ancestral Diet (AD)
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 6, 2020 · Synced Sep 4, 2026, 5:14 PM EDT
Not listed Phase 2 Interventional

Ketogenic Diet Treatment of Obesity With Co-morbid Type 2 Diabetes Mellitus and/or Obstructive Sleep Apnea

NCT02069197
View directory record Official record
Conditions
Obesity, Diabetes, Obstructive Sleep Apnea
Interventions
Ketogenic diet, Orlistat, Standardized diet
Other · Drug
Lead sponsor
Mid-Atlantic Epilepsy and Sleep Center, LLC
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 16, 2018 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Impact of Dietary Restriction of Animal Protein and Fat on Osteoarthritis

NCT01939262
View directory record Official record
Conditions
Osteoarthritis
Interventions
Limitation of Animal Fat and Protein in the Diet, Control
Other
Lead sponsor
Essentia Health
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Traverse City, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 19, 2013 · Synced Sep 4, 2026, 5:14 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ketogenic Intervention in Depression

NCT06080932
View directory record Official record
Conditions
Depression, Ketosis
Interventions
Ketogenic Diet, NIH Toolbox, gradCPT, Resting-state fMRI, Task-fMRI, CGM/CKM, Blood Draw, Sleep Monitoring, Ketone/Glucose Monitoring, Body Composition, PHQ-9, WHO-5, SKID
Other · Biological · Behavioral
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 30 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 28, 2025 · Synced Sep 4, 2026, 5:14 PM EDT