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Showing 1–24 of 237 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Dietary Protein Intake 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 5, 2026, 11:21 AM 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Withdrawn Not applicable Interventional Accepts healthy volunteers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 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

CO-OP Trial: Community-based Outreach on Obesity in Pregnancy

NCT01841424
View directory record Official record
Conditions
Obesity, Pregnancy
Interventions
Dietary counseling. Maintain a food diary.
Behavioral
Lead sponsor
University of Missouri, Kansas City
Other
Eligibility
Female only
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
2
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 29, 2018 · Synced Sep 5, 2026, 11:21 AM 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 5, 2026, 11:21 AM 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 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oscillations of Dietary Fat/Carbohydrate Intake Over Interval of 3 to 4 Days

NCT01115075
View directory record Official record
Conditions
Healthy
Interventions
Dietary fat/intake of carbohydrate, Spontaneous oscillations of dietary fat/intake of carbohydrate in relation to energy intake.
Other · Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
21 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 24, 2016 · Synced Sep 5, 2026, 11:21 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Oral Intake During Labor

NCT03276741
View directory record Official record
Conditions
Labor Complication, Food Aspiration, Complication of Anesthesia, Satisfaction
Interventions
gastric soft/bland diet
Dietary Supplement
Lead sponsor
David Grant U.S. Air Force Medical Center
Federal
Eligibility
18 Years and older · Female only
Enrollment
126 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Travis Air Force Base, California
Source: ClinicalTrials.gov public record
Updated Apr 23, 2020 · Synced Sep 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Natural Protein vs. Protein Supplements on Peritoneal Dialysis Patients

NCT03569410
View directory record Official record
Conditions
Peritoneal Dialysis Complication, Hypoalbuminemia, Malnutrition
Interventions
increased protein intake via natural foods, increase protein intake via protein supplements
Behavioral
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Riverside, California
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Athlete Whey Protein Sensitivity: Prevalence and Performance

NCT05482997
View directory record Official record
Conditions
Food Intolerance
Interventions
Whey Protein Concentrate, Pea Protein Isolate, Rice Protein Concentrate, Hemp Protein
Dietary Supplement
Lead sponsor
University of the Incarnate Word
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 4, 2024 · Synced Sep 5, 2026, 11:21 AM EDT
Active, not recruiting Not applicable Interventional

Effect of VLCD on the Reduction of Liver Steatosis and Fibrosis in Subjects With Obesity and NAFLD

NCT04861571
View directory record Official record
Conditions
NAFLD
Interventions
Dietary intervention with very low calorie diet (VLCD), Control Arm
Dietary Supplement · Other
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 5, 2026, 11:21 AM EDT
Recruiting Phase 2 Interventional

Enteral Nutrition Versus Standard of Care in Allogeneic Hematopoietic Stem Cell Transplantation

NCT07315165
View directory record Official record
Conditions
Allogeneic Hematopoietic Stem Cell Transplant (Allo-HSCT)
Interventions
Enteral Nutrition
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet Composition and Physical Inactivity on Insulin Sensitivity and β-cell Function

NCT03013764
View directory record Official record
Conditions
Physical Inactivity, Dietary Protein
Interventions
normal protein diet, high protein intake
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 45 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 14, 2018 · Synced Sep 5, 2026, 11:21 AM EDT
Terminated Not applicable Interventional

Effect of Meal Composition and Timing Modification on Glucose Metabolism, Body Temperature and Sleep

NCT05413928
View directory record Official record
Conditions
PreDiabetes, Type 2 Diabetes, Healthy
Interventions
Time Restrictive Eating- late, Time Restrictive Eating- early, Time Restrictive Eating- early with early caloric intake, Macronutrient-controlled meals
Behavioral · Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 5, 2026, 11:21 AM 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 5, 2026, 11:21 AM EDT
Not yet recruiting Not applicable Interventional

Ketogenic Approach to Restore Muscle in Older Patients With Community-Acquired Pneumonia - KARMA-P Trial

NCT07308483
View directory record Official record
Conditions
Pneumonia
Interventions
Ketogenic feeding, Standard feeding
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
55 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Sep 5, 2026, 11:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Increasing Caloric Intake on Diet-Induced Thermogenesis and 24h Energy Expenditure

NCT05545306
View directory record Official record
Conditions
Obesity, Normal Physiology, Healthy Volunteers
Interventions
+200% of dietary requirements, 50% of calories from carbohydrates, 20% from protein, and 30% from fat, fasting, -50% of energy balance requirements. 50% of calories from carbohydrates, 20% from protein, and 30% from fat, +150% of energy balance requirements, 50% of calories from carbohydrates, 20% from protein, and 30% from fat, +200% of dietary requirements, 51% of the calories from carbohydrates, 46%, from fat and 3% from protein, -25% of energy balance requirements, 50% of calories from carbohydrates, 20% from protein, and 30% from fat, +150% of dietary requirements, 51% of the calories from carbohydrates, 46%, from fat and 3% from protein
Dietary Supplement
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 60 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 5, 2026, 11:21 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Anabolic Response to Beef vs Plant Protein in (Pre)Frail Older Adults Using a Novel Stable Isotope Pulse Method

NCT07254403
View directory record Official record
Conditions
Protein Metabolism
Interventions
Beef, Tofu, Placebo
Other
Lead sponsor
Texas A&M University
Other
Eligibility
65 Years to 95 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Nov 27, 2025 · Synced Sep 5, 2026, 11:21 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Think AHEAD (A Healthy Eating And Drinking) Study

NCT01044134
View directory record Official record
Conditions
Obesity
Interventions
Dietary counseling
Behavioral
Lead sponsor
Boston Children's Hospital
Other
Eligibility
12 Years to 17 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Sep 5, 2026, 11:21 AM EDT
Recruiting Not applicable Interventional

Lifestyle Change Implementation Research Network at PRC at UMass Chan

NCT07481305
View directory record Official record
Conditions
GLP - 1
Interventions
Digital Lifestyle Coaching Program
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Sep 5, 2026, 11:21 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Effects of Increased, Egg-Based Protein Intake on Muscle Composition,

NCT01396915
View directory record Official record
Conditions
Muscle Composition, Sarcopenia, Hypertrophy, Inflammation
Interventions
Dietary Protein Intake
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
55 Years to 80 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 3, 2016 · Synced Sep 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Results available

Very Low Carbohydrate Diet as an Adjunctive Therapy for Youth Type 1 Diabetes

NCT04082884
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Very Low Carbohydrate Diet
Behavioral
Lead sponsor
Yale University
Other
Eligibility
13 Years to 25 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 5, 2026, 11:21 AM 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 5, 2026, 11:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Alpha-lactalbumin Intake on Metabolic and Cognitive Functions in Elderly

NCT02082418
View directory record Official record
Conditions
Mild Cognitive Impairment
Interventions
Alpha-lactalbumin, Whey, Casein
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
55 Years and older
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
1
States / cities
College Station, Texas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 5, 2026, 11:21 AM 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 5, 2026, 11:21 AM EDT