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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dietary Protein Clear all
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Effect of Protein on Calcium Absorption and Gastric Acid Production

NCT00719160
View directory record Official record
Conditions
Osteoporosis
Interventions
esomeprazole, Placebo
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 45 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 5, 2020 · Synced Sep 26, 2026, 10:44 AM EDT
Active, not recruiting Not applicable Interventional Results available

Early Protein Supplementation in Extremely Preterm Infants Fed Human Milk

NCT04325308
View directory record Official record
Conditions
Prematurity; Extreme, Feeding Disorder Neonatal, Breast Milk Expression, Growth Failure, Microbial Colonization
Interventions
Protein-enriched human milk diet, Usual human milk diet
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 4 Days
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional

Impact of Resistance Training-Protein Supplementation on Lean Muscle Mass in Childhood Cancer Survivors

NCT02501460
View directory record Official record
Conditions
Cancer
Interventions
Educational handouts, Resistance training, Supplementation, Placebo
Other · Dietary Supplement
Lead sponsor
St. Jude Children's Research Hospital
Other
Eligibility
18 Years to 44 Years
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 16, 2018 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increased Protein at Breakfast for Weight Management in Overweight Adolescents

NCT03146442
View directory record Official record
Conditions
Obesity, Adolescent
Interventions
Breakfast
Behavioral
Lead sponsor
University of Texas at Austin
Other
Eligibility
13 Years to 21 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2023
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Oct 30, 2023 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Dietary Protein Source on Calcium Metabolism

NCT00187538
View directory record Official record
Conditions
Calcium Metabolism
Interventions
Dietary
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
55 Years and older · Female only
Enrollment
183 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2013
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 20, 2014 · Synced Sep 26, 2026, 10:44 AM EDT
Recruiting Not applicable Interventional

Whey Protein Ingestion and Glucose Control in Pre- and Post Diabetic Individuals

NCT06694155
View directory record Official record
Conditions
Prediabetes / Type 2 Diabetes
Interventions
Whey Protein Isolate Crossover, Placebo
Dietary Supplement
Lead sponsor
University of Arkansas
Other
Eligibility
50 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Diet and/or Exercise-induced Weight Loss on Cardiovascular Risk Factors

NCT00588978
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
diet and/or exercise
Behavioral
Lead sponsor
Yale University
Other
Eligibility
40 Years to 65 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 16, 2020 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Alternate Day Fasting Combined With a High Protein Background Diet

NCT03528317
View directory record Official record
Conditions
Obesity
Interventions
Alternate day fasting
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 65 Years
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 7, 2021 · Synced Sep 26, 2026, 10:44 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Investigating the Cognitive and Brain Health Benefits of Lean Pork Consumption

NCT07031076
View directory record Official record
Conditions
Dietary Intervention, Dietary Proteins, Dietary Assessment, Older Adults (65 Years and Older), Cognitive Ability, General
Interventions
Ready-to-eat lean pork in frozen, 5-oz packages
Dietary Supplement
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
65 Years to 75 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Dec 25, 2025 · Synced Sep 26, 2026, 10:44 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Improving Dietary Quality Through Animal Source Protein Accessibility in a Low-Resource Setting

NCT07620028
View directory record Official record
Conditions
Nutrition Intervention, Healthy Eating, Diet, Healthy, Hunger, Food Security
Interventions
Nutrition Secure Indianapolis Food Box Intervention, Nutrition Secure Indianapolis Nutrition Education
Other · Behavioral
Lead sponsor
Purdue University
Other
Eligibility
5 Years and older
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
2
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 1, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Recruiting Not applicable Interventional

A Dietary Study for People With Multiple Myeloma

NCT07226609
View directory record Official record
Conditions
Multiple Myeloma
Interventions
nutrition counseling and coaching, dietary guidelines, research dietitian visit, Questionnaires, Frozen pre-prepared meals
Other · Behavioral
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
220 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional

Pilot Study of Diet and Behavior in Children With Autism

NCT01625299
View directory record Official record
Conditions
Autism
Interventions
Gluten and dry milk, Placebo
Dietary Supplement
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
3 Years to 12 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 20, 2012 · Synced Sep 26, 2026, 10:44 AM EDT
Completed No phase listed Observational

Effect of the Level of Dietary Protein on Body Composition

NCT01489098
View directory record Official record
Conditions
Growth Acceleration
Interventions
Not listed
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
2 Years to 6 Years
Enrollment
178 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
2
States / cities
Iowa City, Iowa • Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Mar 17, 2015 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Influence of Regular Beef Consumption and Protein Density of the Diet on Training-induced Gains in Muscle Strength and Performance in Healthy Adults

NCT03029975
View directory record Official record
Conditions
Aging
Interventions
Resistance Training Exercise, Beef Protein Consumption
Behavioral
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
40 Years to 64 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 12, 2019 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Beneficial Effects of a Protein-rich Breakfast on Appetite Control & Cognition in Overweight and Obese Adolescents

NCT01192100
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Breakfast Skipping, Normal Protein Breakfast Meals, Protein-rich Breakfast Meals
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
15 Years to 20 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 2, 2020 · Synced Sep 26, 2026, 10:44 AM EDT
Recruiting Not applicable Interventional

A Pilot, Feasibility Study of Intermittent Caloric Restriction Plus Plant-based Diet in Cancer Patients Receiving Chemotherapy

NCT05359848
View directory record Official record
Conditions
Medical Oncology, Integrative Oncology, Medical Nutrition Therapy
Interventions
Diet
Other
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
2
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Protein Source on Plasma Amino Acid Concentrations In Older Adults

NCT04243395
View directory record Official record
Conditions
Protein Deposition
Interventions
Pork, Egg, Black beans, Almonds
Other
Lead sponsor
Purdue University
Other
Eligibility
55 Years to 75 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 27, 2022 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

What's Hopping? Cricket Protein and Human Gut Microbiota

NCT03383341
View directory record Official record
Conditions
Healthy
Interventions
Cricket Protein Powder, Placebo control
Dietary Supplement · Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 3, 2019 · Synced Sep 26, 2026, 10:44 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

LiveSMART Trial to Prevent Falls in Patients With Cirrhosis - Supplementary Study

NCT07140120
View directory record Official record
Conditions
Cirrhosis, Liver, Portal Hypertension
Interventions
Not listed
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
3
States / cities
Ann Arbor, Michigan • Philadelphia, Pennsylvania • Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PROOF: PROtein OverFeeding Effect on Body Weight

NCT00565149
View directory record Official record
Conditions
Obesity
Interventions
PROOF
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 35 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2016
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Aug 24, 2021 · Synced Sep 26, 2026, 10:44 AM EDT
Terminated Not applicable Interventional

Mediterranean Diet and Protein-Sparing Modified Diet for Metabolic Syndrome in Liver Transplant Recipients

NCT02174783
View directory record Official record
Conditions
Liver Transplantation, Metabolic Syndrome X, Obesity
Interventions
Control group, Mediterranean diet, Protein-Sparing Modified Fast (PSMF)
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Sep 26, 2026, 10:44 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Muscle Response to Different Amounts of Dietary Protein During Leg Immobilization

NCT07069426
View directory record Official record
Conditions
Muscle Disuse, Muscle Disuse Atrophy
Interventions
20 grams protein, 40 grams protein
Dietary Supplement
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Meal Patterning on Weight Loss With Changes to Body Comp, Muscle and Metabolic Health

NCT02066948
View directory record Official record
Conditions
Body Composition, Beneficial, Paresis, Impaired Glucose Tolerance
Interventions
wt loss, meal pattern, even, skew
Other · Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
19 Years to 50 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 31, 2017 · Synced Sep 26, 2026, 10:44 AM EDT
Completed Not applicable Interventional

Low Carbohydrate/High Protein Diet to Improve Metabolic Health

NCT03207841
View directory record Official record
Conditions
Spinal Cord, Metabolic Syndrome, Diabetes
Interventions
LC/HP
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 26, 2023 · Synced Sep 26, 2026, 10:44 AM EDT