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Showing 1–24 of 344 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Diet - higher protein Clear all
Completed Phase 3 Interventional Accepts healthy volunteers

Effect of Dietary Soy on Estrogens in Breast Fluid, Blood, and Urine Samples From Healthy Women

NCT00513916
View directory record Official record
Conditions
Breast Cancer, Healthy, no Evidence of Disease
Interventions
soy isoflavones
Dietary Supplement
Lead sponsor
University of Hawaii Cancer Research Center
Other
Eligibility
30 Years to 45 Years · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Dec 18, 2013 · Synced Sep 3, 2026, 5:07 PM EDT
Not yet recruiting Not applicable Interventional

Fueling Labor: Protein Supplementation for Intrapartum Glucose Control

NCT07571343
View directory record Official record
Conditions
Diabetes During Pregnancy
Interventions
High-Protein Beverage (Genius Gourmet Sparkling Protein Water), Standard Clear Liquid Diet, Continuous Glucose Monitoring (Abbott Freestyle Libre)
Dietary Supplement · Other · Device
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 5, 2026 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

"Effect of High Fat and High Glycemic Diets

NCT01494935
View directory record Official record
Conditions
Type 2 Diabetes
Interventions
High Glycemic Diet, Control diet
Behavioral
Lead sponsor
Mayo Clinic
Other
Eligibility
40 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 4, 2020 · Synced Sep 3, 2026, 5:07 PM EDT
Recruiting Not applicable Interventional

Carbohydrate Beta Cell Function and Glucose Control in Children With Diabetes

NCT05899166
View directory record Official record
Conditions
Diabetes Mellitus, Type 1
Interventions
Ketogenic diet, food delivery and education, Standard diet, food delivery and education
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
5 Years to 12 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 23, 2025 · Synced Sep 3, 2026, 5:07 PM EDT
Not yet recruiting Not applicable Interventional

Optimizing Adaptive Intensive Behavioral Therapy for Obesity During the Transition to Older Adulthood

NCT07446907
View directory record Official record
Conditions
Obesity & Overweight, Sarcopenia
Interventions
High Protein Diet Counceling, Standard Protein Diet Counceling, Protein Supplement, Supervised Exercise
Behavioral
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
50 Years to 75 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 2, 2026 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional

Prepared Meals to Prime and Perpetuate Reduced Dietary Sodium Intake in Hemodialysis

NCT03990311
View directory record Official record
Conditions
Hypertension in Dialysis Patients, Fluid Overload in Dialysis Patients
Interventions
Sodium Restricted Meals, Control
Other
Lead sponsor
Tufts Medical Center
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 17, 2023 · Synced Sep 3, 2026, 5:07 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Animal and Plant Proteins and Glucose Metabolism

NCT03994367
View directory record Official record
Conditions
Metabolic Syndrome, Metabolic Syndrome, Protection Against, Glucose Metabolism Disorders
Interventions
High animal protein isolate, High animal protein whole food, High plant protein isolate, High plant protein whole food
Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
21 Years to 70 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2028
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Eggs on Postprandial Metabolism

NCT01351207
View directory record Official record
Conditions
Healthy
Interventions
Eggs
Other
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 18, 2014 · Synced Sep 3, 2026, 5:07 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Development of a Novel Method to Measure Insulin Sensitivity in Humans: A Pilot Study

NCT04774081
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
24h Continuous glucose monitoring and urinary C-peptide collection
Device
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 65 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jun 13, 2022 · Synced Sep 3, 2026, 5:07 PM EDT
Recruiting Not applicable Interventional

Symptoms of Polycystic Ovarian Syndrome Ameliorated by Keto-Adaptation Pilot

NCT07227363
View directory record Official record
Conditions
PCOS (Polycystic Ovary Syndrome)
Interventions
Ketogenic diet, Exogenous Ketone Supplement
Other · Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Intake Modifications to Protect Against Changes in Bone Metabolism

NCT01713634
View directory record Official record
Conditions
Bone Resorption
Interventions
Preflight, In-flight
Other
Lead sponsor
National Aeronautics and Space Administration (NASA)
Federal
Eligibility
Not listed
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 15, 2015 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Phase 2 Interventional

N-Acetylcysteine and Milk Thistle for Treatment of Diabetic Nephropathy

NCT00915200
View directory record Official record
Conditions
Diabetic Nephropathies, Proteinuria, Oxidative Stress
Interventions
N-acetylcysteine, silibin, high-dose silibin, N-acetylcysteine placebo, silibin placebo
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 70 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2016
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jun 26, 2016 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Metabolic Effects of Consuming Sugar-Sweetened Beverages for Two Weeks

NCT01103921
View directory record Official record
Conditions
Metabolic Syndrome, Insulin Resistance, Dyslipidemia
Interventions
Glucose, Fructose, High-Fructose Corn Syrup, No sugar (Aspartame)
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 40 Years
Enrollment
214 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional

Therapeutic Diets in Alzheimer's Disease

NCT03860792
View directory record Official record
Conditions
Alzheimer Disease
Interventions
Ketogenic Diet, Therapeutic Lifestyles Changes Diet
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
50 Years to 90 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Fairway, Kansas
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a PUFA-rich Diet on Acute Metabolic and Inflammatory High-Fat Meal Responses

NCT02246933
View directory record Official record
Conditions
Inflammation, Obesity
Interventions
PUFA Diet, Control Diet
Other
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 35 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 7, 2015 · Synced Sep 3, 2026, 5:07 PM 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 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Saturated Fat on Large Low-density Lipoprotein (LDL) and High-density Lipoprotein (HDL)

NCT00895141
View directory record Official record
Conditions
Dyslipidemia
Interventions
Saturated Fat Diet
Dietary Supplement
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years to 70 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated Jan 13, 2013 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Increased Free Fatty Acids on Leptin Function

NCT01520454
View directory record Official record
Conditions
Obesity, Leptin Resistance
Interventions
Saline, Intralipid, Water, oral fat, Heparin
Drug · Dietary Supplement
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 10, 2018 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Phase 3 Interventional

Diet and PSA Levels in Patients With Prostate Cancer

NCT00003367
View directory record Official record
Conditions
Prostate Cancer
Interventions
green tea, soy protein isolate, vitamin E
Dietary Supplement
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older · Male only
Enrollment
154 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1998 – 2002
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 25, 2013 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional

Fully Remote, Telehealth-based Ketogenic Metabolic Therapy for Long COVID

NCT07745699
View directory record Official record
Conditions
Long COVID Fatigue
Interventions
Ketogenic Metabolic Therapy, Lifestyle Intervention
Other · Behavioral
Lead sponsor
National University of Natural Medicine
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Results available

Delish Study: Diabetes Education to Lower Insulin, Sugars, and Hunger

NCT03207711
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Carbohydrate-restricted diet, Mindfulness
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 7, 2025 · Synced Sep 3, 2026, 5:07 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 3, 2026, 5:07 PM EDT
Enrolling by invitation Not applicable Interventional

Plant-Focused Nutrition in Patients With Diabetes and Chronic Kidney Disease

NCT05514184
View directory record Official record
Conditions
Chronic Kidney Disease (CKD) With Diabetes Mellitus (DM), CKD Stage 3, CKD Stage 4, CKD Stage 5, Diabetes Mellitus, Diabetic Kidney Disease
Interventions
PLAFOND diet
Dietary Supplement
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
2
States / cities
Orange, California • Torrance, California
Source: ClinicalTrials.gov public record
Updated Jul 2, 2024 · Synced Sep 3, 2026, 5:07 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Protein and Fiber at Breakfast on Appetite, Blood Sugar, and Cholesterol

NCT02169245
View directory record Official record
Conditions
Brain Activity, Appetite, Ingestive Behavior, Glucose Control, Cholesterol
Interventions
Dietary control of protein and fiber intake at breakfast
Other
Lead sponsor
Purdue University
Other
Eligibility
21 Years to 45 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
2
States / cities
West Lafayete, Indiana • West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Feb 4, 2016 · Synced Sep 3, 2026, 5:07 PM EDT