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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Control protein diet Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Randomized Placebo Controlled Clinical Study of an Oral Product in Subjects With Menopausal Symptoms

NCT06787443
View directory record Official record
Conditions
Menopausal Symptoms
Interventions
Placebo, Dietary Supplement with Proprietary Herbal Extract Blend and GABA
Dietary Supplement
Lead sponsor
Olly, PBC
Industry
Eligibility
40 Years to 65 Years · Female only
Enrollment
88 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jan 21, 2025 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Whole Coffee Fruit Concentrate Pilot Study 1

NCT01965795
View directory record Official record
Conditions
Brain-derived Neurotrophic Factor (BDNF), Cognitive Function, Affect
Interventions
Whole Coffee Fruit Concentrate (WCFC), Nutrim
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
40 Years to 55 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 18, 2015 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Effect of a Fermented Dairy Protein With Prebiotic Fiber on GI Complaints

NCT06946017
View directory record Official record
Conditions
Digestive Health, Quality of Life
Interventions
Fermented dairy protein with prebiotic fiber supplement, Control placebo
Dietary Supplement
Lead sponsor
Arizona State University
Other
Eligibility
18 Years to 50 Years
Enrollment
114 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Influence of Simple, Low-Cost Chemistry Intervention Videos: A Randomized Trial of Children's Preferences for Sugar-Sweetened Beverages

NCT04971317
View directory record Official record
Conditions
Obesity, Type 2 Diabetes, Dental Caries
Interventions
Sugar-Sweetened Beverage (SSB) Video, Water Video, Control
Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
12 Years to 12 Years
Enrollment
326 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 20, 2021 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional

Ketogenic and Nutritional Interventions for First Episode Bipolar Disorder

NCT06221852
View directory record Official record
Conditions
Bipolar I Disorder, Psychosis, Schizoaffective Disorder
Interventions
Ketogenic diet, Dietary Guidelines for Americans
Other
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 45 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 16, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Results available

Pilot Study of Nutrition in Maintenance Hemodialysis Patients

NCT02917278
View directory record Official record
Conditions
End-Stage Renal Disease, Meals, Hemodialysis
Interventions
Meals
Dietary Supplement
Lead sponsor
Purdue University
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 18, 2021 · Synced Sep 23, 2026, 2:18 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 23, 2026, 2:18 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 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Protein Requirement of Elderly Men and Women

NCT00812500
View directory record Official record
Conditions
Age
Interventions
Lower Protein, Medium Protein, Higher Protein
Other
Lead sponsor
Purdue University
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2006
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 23, 2013 · Synced Sep 23, 2026, 2:18 PM EDT
Not listed Not applicable Interventional

Healthy Heart Score Intervention In the Primary Care Setting

NCT03482427
View directory record Official record
Conditions
Cardiovascular Diseases
Interventions
Healthy Heart Score
Behavioral
Lead sponsor
Ohio University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Dublin, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 28, 2018 · Synced Sep 23, 2026, 2:18 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Trial to Examine the Effects of a Weight Loss Program Emphasizing Protein, Dietary Fiber, and Exercise (30-30-30 Plan)

NCT07789769
View directory record Official record
Conditions
Overweight , Obesity
Interventions
30-30-30 PFE Intervention, Standard
Behavioral
Lead sponsor
Midwest Center for Metabolic and Cardiovascular Research
Other
Eligibility
18 Years to 69 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
3
States / cities
Addison, Illinois • Chicago, Illinois • Bloomington, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Phase 3 Interventional Results available

A Study of Tirzepatide (LY3298176) In Participants After A Lifestyle Weight Loss Program

NCT04657016
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Tirzepatide, Placebo
Drug · Other
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years and older
Enrollment
579 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
45
States / cities
Huntington Park, California • Los Angeles, California • Montclair, California + 42 more
Source: ClinicalTrials.gov public record
Updated May 15, 2024 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Beneficial Effects of Healthy Snacks on Appetite Control, Satiety, and Reward-driven Eating Behavior in Young People

NCT01781286
View directory record Official record
Conditions
Obesity
Interventions
High Protein, Low Protein
Behavioral
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
13 Years to 19 Years
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 22, 2018 · Synced Sep 23, 2026, 2:18 PM 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 23, 2026, 2:18 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of Dietary Erythritol on Platelet Reactivity and Vascular Inflammation

NCT05967741
View directory record Official record
Conditions
Platelet Aggregation, Spontaneous, Vascular Thrombosis
Interventions
Erythritol, Aspartame
Other
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 70 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 13, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Harvesting Health: Advancing Nutrition and Wellness for Moms and Babies

NCT07659821
View directory record Official record
Conditions
Pregnant Women With Singleton Pregnancies
Interventions
Food Kit
Other
Lead sponsor
Texas A&M University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
3
States / cities
College Station, Texas • Dallas, Texas • Mansfield, Texas
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Terminated Not applicable Interventional

Ketogenic Diet in Patients With Heart Failure

NCT04235699
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction
Interventions
Nutritional and Dietary Manipulation
Other
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 75 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 23, 2024 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

LMN-101 in a Campylobacter Human Challenge Model

NCT04182490
View directory record Official record
Conditions
Campylobacter Infections
Interventions
LMN-101, Placebo
Biological · Drug
Lead sponsor
Lumen Bioscience, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 24, 2025 · Synced Sep 23, 2026, 2:18 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Nutritional Supplementation in the Elderly With Weight Loss

NCT04350762
View directory record Official record
Conditions
Sarcopenia
Interventions
Protein shake + Fish Oil
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
65 Years and older
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 5, 2023 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional

A Study of Time-Restricted Eating in Childhood Cancer Survivors

NCT07009288
View directory record Official record
Conditions
Childhood Cancer Survivors
Interventions
Children's Oncology Group Heart Health Link, Monthly weights, Fasting, Calls, Participant Questionnaires, Dried blood spot
Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2031
U.S. locations
4
States / cities
New York, New York • Memphis, Tennessee • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Fasting-Mimicking Diet on Skin Health

NCT05564624
View directory record Official record
Conditions
Skin
Interventions
Fasting mimicking diet (FMD)
Other
Lead sponsor
L-Nutra Inc
Industry
Eligibility
35 Years to 60 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Richardson, Texas
Source: ClinicalTrials.gov public record
Updated Oct 25, 2023 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional

Dietary Intervention to Mitigate Post-Acute COVID-19 Syndrome

NCT05977179
View directory record Official record
Conditions
Post-Acute COVID-19 Syndrome, Fatigue
Interventions
Dietary intervention to mitigate Post-Acute COVID-19 Syndrome, Attention Control
Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
50 Years to 94 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 22, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Breaking up Prolonged Sedentary Behavior to Improve Cardiometabolic Health

NCT05353322
View directory record Official record
Conditions
Sedentary Behavior, Cardiometabolic Risk Factors, Blood Pressure, Glucose
Interventions
Sedentary Break (Walking) Condition, Sitting (Control) Condition, Controlled Diet
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
324 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 23, 2026, 2:18 PM EDT
Withdrawn Not applicable Interventional

Effect of a Dietary Intervention on Intracellular Lipid Levels, Insulin Sensitivity, and Glycemic Control in Type 2 Diabetes

NCT04088981
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Dietary intervention
Behavioral
Lead sponsor
Physicians Committee for Responsible Medicine
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jun 26, 2025 · Synced Sep 23, 2026, 2:18 PM EDT