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Showing 1–24 of 68 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Protein Intake Clear all
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, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Breakfast Consumption and Energy Balance in Active Adult Males

NCT04862208
View directory record Official record
Conditions
Energy Intake, Substrate Utilization, Hormones, Satiety
Interventions
Maltodextrin supplement, Whey supplement, Water
Dietary Supplement
Lead sponsor
Ohio University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Athens, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Daily Protein Intake Patterns on Energy Metabolism and the Motivation to Snack

NCT02795442
View directory record Official record
Conditions
Obesity
Interventions
Even protein, Skewed protein
Other
Lead sponsor
USDA Grand Forks Human Nutrition Research Center
Federal
Eligibility
20 Years to 60 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2024
U.S. locations
1
States / cities
Grand Forks, North Dakota
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Role of Protein in Regulating Ad Libitum Energy Intake in Humans

NCT02613065
View directory record Official record
Conditions
Energy Balance
Interventions
Consumption of NOW Foods eggwhite protein shake, Consumption of NOW Foods maltodextrin shake
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
30 Years to 50 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 21, 2016 · Synced Sep 3, 2026, 4:10 PM EDT
Active, not recruiting Not applicable Interventional

The Impact of Whey Protein on Frailty in Older Adults Classified as Pre-frail

NCT07167277
View directory record Official record
Conditions
Pre-frail, Pre-Frail Older Adults, Cognition, Physical Function, Dietary Intake Assessment, MRI
Interventions
Whey Protein, Placebo
Dietary Supplement
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
65 Years to 85 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Weight Loss and Dietary Protein Intake on Bone

NCT00473031
View directory record Official record
Conditions
Weight Loss, Bone Density
Interventions
Caloric restriction, high protein, Caloric restriction; normal protein, Counseling
Behavioral
Lead sponsor
Rutgers University
Other
Eligibility
50 Years to 70 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nighttime Protein Intake on Overnight Lipolysis and Morning Fat Oxidation in Obese Men

NCT02211391
View directory record Official record
Conditions
Obesity
Interventions
Casein Protein, Non-caloric placebo
Other
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Aug 12, 2015 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Phase 1 Interventional

Implementation of a Nutritional Tool During Melphalan Autologous Transplant to Improve Caloric and Protein Intake

NCT03449927
View directory record Official record
Conditions
Melphalan Autologous Transplant
Interventions
Specialized menu, Standard of care menu, Self report dietary intake worksheet, Post study questionnaire
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 12, 2019 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Protein and Insulin Sensitivity Study

NCT00508937
View directory record Official record
Conditions
Insulin Resistance, Type 2 Diabetes, Metabolic Syndrome, Cardiovascular Disease, Dyslipidemia
Interventions
Diet
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older
Enrollment
660 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
2
States / cities
Berkeley, California • San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 22, 2020 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional

EAA Intake to Optimize Protein Anabolism in COPD

NCT01173354
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Free balanced amino acid mixture, Free essential amino acid mixture
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
45 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 29, 2025 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Increased Dietary Protein and Meal Frequency Reduces Total and Abdominal Body Fat During Weight Maintenance and Weight Loss

NCT01749449
View directory record Official record
Conditions
Obesity
Interventions
protein and meal frequency
Other
Lead sponsor
Skidmore College
Other
Eligibility
30 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Saratoga Springs, New York
Source: ClinicalTrials.gov public record
Updated Dec 12, 2012 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Protein Source on Appetite Control, Satiety, and Subsequent Food Intake

NCT03154606
View directory record Official record
Conditions
Appetitive Behavior
Interventions
Micellar Casein (#1), Micellar Casein (#2), Calcium Caseinate, Sodium Caseinate, Milk Protein Isolate, Pure Protein Blend, Whey Protein Isolate, Native Whey Protein Isolate, Soy Protein, Pea Protein, Native Whey: Micellar Casein (50:50) blend, Carbohydrate Control
Other
Lead sponsor
Purdue University
Other
Eligibility
20 Years to 40 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 1, 2019 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Comparison of Satiety Effects Two Commercially Available Snack Bars

NCT07227701
View directory record Official record
Conditions
Satiety
Interventions
High carbohydrate snack bar, High protein snack bar
Other
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 65 Years
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving Dietary Protein Intake in Adults

NCT04378556
View directory record Official record
Conditions
Healthy
Interventions
Nutritional coaching
Behavioral
Lead sponsor
Florida Atlantic University
Other
Eligibility
55 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Boca Raton, Florida
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Results available

Neurodevelopmental and Growth Outcomes of Early, Aggressive Protein Intake in Very Low Birthweight Infants

NCT01860573
View directory record Official record
Conditions
Prematurity
Interventions
Amino acids
Drug
Lead sponsor
Women and Infants Hospital of Rhode Island
Other
Eligibility
Up to 18 Hours
Enrollment
168 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Apr 9, 2017 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessment of a New Food Product in Metabolically at Risk Children

NCT03175003
View directory record Official record
Conditions
Cardiovascular Risk Factor, Inflammation, Micronutrient Deficiency
Interventions
Food Product
Other
Lead sponsor
University of California, Davis
Other
Eligibility
9 Years to 13 Years
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated May 29, 2019 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Results available

Online Dietary and Resistance Training to Improve Physical Function in Older Cancer Survivors, E-PROOF Trial

NCT06016725
View directory record Official record
Conditions
Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8, Anatomic Stage III Breast Cancer AJCC v8, Stage I Colorectal Cancer AJCC v8, Stage I Prostate Cancer AJCC v8, Stage II Colorectal Cancer AJCC v8, Stage II Prostate Cancer AJCC v8, Stage III Colorectal Cancer AJCC v8, Stage III Prostate Cancer AJCC v8
Interventions
Exercise Intervention, Informational Intervention, Nutritional Assessment, Physical Performance Testing, Quality-of-Life Assessment, Questionnaire Administration
Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
65 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 1, 2026 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Protein Source on Appetite Control, Satiety, and Subsequent Food Intake: A Clinical Screening Study

NCT03595436
View directory record Official record
Conditions
Appetitive Behavior
Interventions
Pea Protein-20g, Pea Protein-30g, Pea Protein-40g, Whey Protein-20g, Carbohydrate Control
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
20 Years to 40 Years · Male only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated May 1, 2019 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Development Of An Innovative Panel of Methods To Measure Intestinal Macronutrient Digestion, Absorption, and Function

NCT01494909
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Ensure plus
Dietary Supplement
Lead sponsor
Texas A&M University
Other
Eligibility
10 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 30, 2025 · Synced Sep 3, 2026, 4:10 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Daily Protein Pacing Effects on HbA1c in Type 2 Diabetics

NCT05355090
View directory record Official record
Conditions
Type 2 Diabetes, HbA1c, Protein Intake
Interventions
PP
Dietary Supplement
Lead sponsor
Skidmore College
Other
Eligibility
30 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Saratoga Springs, New York
Source: ClinicalTrials.gov public record
Updated Apr 7, 2024 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Molecular Mechanisms Underlying Anabolic Resistance to Protein Intake During Muscle Disuse

NCT06228742
View directory record Official record
Conditions
Atrophy, Disuse, Muscle Atrophy, Muscular Disorders, Atrophic, Disuse Atrophy, Disuse Atrophy Muscle of Thigh
Interventions
Unilateral leg immobilization, Contralateral active leg
Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 39 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2024 · Synced Sep 3, 2026, 4:10 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Increasing Lean Protein Intake in Preschool-age Children and Assessing Effects on Cognition and Select Health Outcomes

NCT06882252
View directory record Official record
Conditions
Diet Modification
Interventions
Low glycemic index diet
Other
Lead sponsor
Sibylle Kranz, PhD, RDN
Other
Eligibility
2 Years to 5 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 17, 2025 · Synced Sep 3, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

High Quality Protein for Assisting With Weight Loss

NCT03085511
View directory record Official record
Conditions
Obesity
Interventions
Egg breakfast (EB), Weight Loss Counseling, Weight Loss Diet, Cereal Breakfast (CB)
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 44 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated May 29, 2019 · Synced Sep 3, 2026, 4:10 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Increased Dietary Protein Intake During GLP-1 Medication Use (in Middle-aged Women With Overweight/Obesity)

NCT07480109
View directory record Official record
Conditions
Obesity, Women (Between 30 to 60 Years Old)
Interventions
Protein Rich Foods
Behavioral
Lead sponsor
University of Texas at Austin
Other
Eligibility
30 Years to 60 Years · Female only
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
2
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Sep 3, 2026, 4:10 PM EDT