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Showing 1–24 of 51 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Meal portion size Clear all
Completed Not applicable Interventional

Effect of Portion-control Training on Food Intake

NCT02942589
View directory record Official record
Conditions
Feeding Behaviors
Interventions
Meal portion size
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 66 Years · Female only
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 23, 2016 · Synced Sep 4, 2026, 1:21 PM EDT
Withdrawn Not applicable Interventional

Effects of Variety and Portion Size on Meal Intake of Adults

NCT05152693
View directory record Official record
Conditions
Eating Behavior
Interventions
Low variety, High Variety, Small Portion Size, Large Portion Size, With Beverage, Without Beverage
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 65 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 9, 2021 · Synced Sep 4, 2026, 1:21 PM EDT
Withdrawn Not applicable Interventional

Combined Effects of Variety and Portion Size on Meal Intake of Women

NCT05177367
View directory record Official record
Conditions
Eating Behavior
Interventions
Sequential Variety, Simultaneous Variety, Single Food, Small portion, Large Portion
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 65 Years · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 3, 2022 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HomeStyles-2: Shaping HOME Environments and LifeSTYLES to Prevent Childhood Obesity

NCT04802291
View directory record Official record
Conditions
Healthy Lifestyle, Home Environment Related Disease, Cognitive Change, Child Behavior, Child Obesity, Parenting, Parents, Parent-Child Relations
Interventions
HomeStyles-2: Obesity Prevention Program for Families with Children in Middle Childhood
Behavioral
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
24 Years to 50 Years
Enrollment
459 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated May 7, 2026 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional

I Can Do This! Managing My Diabetes

NCT06695533
View directory record Official record
Conditions
Diabetes
Interventions
Diabetes self management workbook
Behavioral
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Portion Size and Energy Density of a Single Meal in Preschool Children

NCT02299531
View directory record Official record
Conditions
Feeding Behaviors
Interventions
Varying meal energy density and portion size
Other
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 6 Years
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2013
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 23, 2014 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Results available

Variations in Palatability and Portion Size of Vegetables on Meal Intake of Preschool Children

NCT03926065
View directory record Official record
Conditions
Feeding Behavior
Interventions
Plain Vegetables Served in 100% Portion Size, Plain Vegetables Served in 200% Portion Size, Enhanced Vegetables Served in 100% Portion Size, Enhanced Vegetables Served in 200% Portion Size
Other
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 5 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 24, 2020 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Results available

Learning to Love Mealtime Together

NCT04502979
View directory record Official record
Conditions
Infant Obesity, Parenting, Feeding Behavior
Interventions
Responsive Feeding Training
Behavioral
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
3 Months to 9 Months
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 10, 2020 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Evaluate Relative Bioavailability, Proton Pump Inhibitor (PPI) (Rabeprazole) Effect, Food Effect and Particle Size Effect of New Acalabrutinib Tablet in Healthy Subjects

NCT04488016
View directory record Official record
Conditions
Bioavailability, B-cell Lymphoid Cancer
Interventions
Treatment A- Part 1, Treatment B- Part 1, Treatment C - Part 1, Treatment D- Part 1, Treatment A-Part 2, Treatment B - Part 2, Treatment C - Part 2, Treatment D - Part 2
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years to 55 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 2, 2021 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

HomeStyles-2: Shaping HOME Environments and LifeSTYLES to Prevent Childhood Obesity in SNAP-Education

NCT05019339
View directory record Official record
Conditions
Healthy Lifestyle, Home Environment Related Disease, Child Behavior, Cognitive Change, Child Obesity, Parenting, Parents, Parent-Child Relations
Interventions
Healthy HomeStyles, Eat Healthy Be Active
Behavioral
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 110 Years
Enrollment
247 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated May 31, 2023 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Varying the Energy Density and Portion Size of the Main Course After a First-course Salad

NCT01729390
View directory record Official record
Conditions
Obesity
Interventions
Energy density and portion size feeding study
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 45 Years · Female only
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 19, 2012 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Virta Intervention in CommuniTies in cOloRado (VICTOR-Pilot)

NCT04807218
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Virta Health
Behavioral
Lead sponsor
Colorado Prevention Center
Other
Eligibility
18 Years to 79 Years
Enrollment
51 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
3
States / cities
Craig, Colorado • Lamar, Colorado • Salida, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional

Combined Effects of Sequential Variety and Portion Size on Meal Intake of Women

NCT05485168
View directory record Official record
Conditions
Eating Behavior
Interventions
Sequential Variety, Single-Food, Small Portion, Large Portion
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 65 Years · Female only
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 21, 2023 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional

The Influence of Satiation Measures on the Portion Size Effect

NCT03886428
View directory record Official record
Conditions
Feeding Behavior
Interventions
100% portion size, 125% portion size, 150% portion size, 175% portion size
Other
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 70 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 12, 2020 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

PrOtein and WEight Loss in teenageRs

NCT02079831
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Energy Restriction, Higher protein, Lower Protein
Behavioral
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
12 Years to 17 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Jan 10, 2016 · Synced Sep 4, 2026, 1:21 PM EDT
Active, not recruiting Not applicable Interventional

Solutions for Hunger And Regulating Eating

NCT05004883
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Regulation of Cues Enhanced, Behavioral Weight Loss, Nutrition Education, Stress Management and Social Support
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Sep 4, 2026, 1:21 PM EDT
Recruiting Phase 2 Interventional

Milk Thistle Clinical Trial in Pediatric NAFLD

NCT06477146
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease (NAFLD)
Interventions
Milk thistle (MT), Placebo, Lifestyle Modification, Fibroscan
Drug · Behavioral · Device
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
9 Years to 22 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Translational Health After School Program on Health-Related Knowledge/Behaviors and Exercise Perception

NCT02932813
View directory record Official record
Conditions
Changes in Physical Fitness, Changes in Diet, Food, and Nutrition Habits, Changes in Child Health
Interventions
THINK Program
Behavioral
Lead sponsor
University of Miami
Other
Eligibility
8 Years to 12 Years
Enrollment
73 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated Oct 16, 2017 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional

Effects of Portion Size of Multiple Items at a Meal on Food Intake of Adults

NCT02369588
View directory record Official record
Conditions
Feeding Behaviors
Interventions
Food portion size
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 45 Years · Female only
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 23, 2015 · Synced Sep 4, 2026, 1:21 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Eating Behaviors in Shift Workers

NCT04468672
View directory record Official record
Conditions
Shift Work Type Circadian Rhythm Sleep Disorder, Eating Behavior
Interventions
Portion size
Behavioral
Lead sponsor
Columbia University
Other
Eligibility
20 Years to 55 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Internal Cues Versus External Cues for Eating and Activity

NCT04025099
View directory record Official record
Conditions
Eating Behavior, Body Image, Diet Habit, Dietary Habits
Interventions
Internal Cues, External Cues
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 26 Years · Female only
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Apr 26, 2021 · Synced Sep 4, 2026, 1:21 PM EDT
Not listed Not applicable Interventional

Food Cravings Strategies During Dietary Weight Loss

NCT06280339
View directory record Official record
Conditions
Obesity, Food Cravings, Weight Loss
Interventions
Test two food cravings strategies during dietary weight loss, Dietary weight loss program +Food cravings strategies
Behavioral
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 75 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 27, 2024 · Synced Sep 4, 2026, 1:21 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Skills Training Within a Family-based Obesity Treatment Intervention

NCT03271801
View directory record Official record
Conditions
Obesity, Childhood
Interventions
child health education, skills training
Behavioral
Lead sponsor
University of Delaware
Other
Eligibility
4 Years to 8 Years
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Mar 25, 2019 · Synced Sep 4, 2026, 1:21 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Meals Study for Amyotrophic Lateral Sclerosis and Parkinson's Disease

NCT07625605
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis (ALS), Parkinson's Disease (PD)
Interventions
The MIND diet
Behavioral
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
30 Years and older
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
3
States / cities
Elizabethton, Tennessee • Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Sep 4, 2026, 1:21 PM EDT