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Showing 1–24 of 25 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Large Portion Size Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Intake Promoting Effects of Large Portions in Children

NCT00436878
View directory record Official record
Conditions
Eating
Interventions
Food portion size
Behavioral
Lead sponsor
Temple University
Other
Eligibility
5 Years to 6 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2011
U.S. locations
2
States / cities
Philadelphia, Pennsylvania • Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 11, 2018 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Phase 2 Interventional Results available

Monoclonal Antibody Therapy and Vaccine Therapy in Treating Patients With Resected Stage III or Stage IV Melanoma

NCT00084656
View directory record Official record
Conditions
Intraocular Melanoma, Melanoma (Skin)
Interventions
ipilimumab, Tyrosinase/gp100/MART-1 Peptides
Biological
Lead sponsor
Bristol-Myers Squibb
Industry
Eligibility
18 Years to 120 Years
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Apr 13, 2022 · Synced Sep 3, 2026, 7:59 AM 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Withdrawn Not applicable Interventional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 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Results available

Evaluation of the Gastrointestinal Manifestation of Fabry's Disease

NCT02798458
View directory record Official record
Conditions
Fabry's Disease
Interventions
Smartpill, Endoscopic Mucosal Resection
Device · Procedure
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 26, 2023 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Portion Size Effects on Body Weight:Free Living Setting

NCT01820403
View directory record Official record
Conditions
Portion Sizes
Interventions
portion size kcal of box lunch
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 60 Years
Enrollment
233 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Sep 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Study of Novel Approaches for Prevention

NCT01183689
View directory record Official record
Conditions
Weight Gain
Interventions
Small Behavior Changes, Large Behavior Changes
Behavioral
Lead sponsor
Wake Forest University
Other
Eligibility
18 Years to 35 Years
Enrollment
599 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2018
U.S. locations
2
States / cities
Chapel Hill, North Carolina • Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Changing Portion Size Descriptions in a Cafeteria

NCT06263621
View directory record Official record
Conditions
Food Selection, Obesity, Weight Gain, Food Preferences
Interventions
Intervention "Standard"
Behavioral
Lead sponsor
University of Pennsylvania
Other
Eligibility
Not listed
Enrollment
101,481 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 10, 2024 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Results available

A Comparison of MRI Perfusion and FDG PET/CT to Distinguish Between Radiation Injury and Tumor Progression

NCT01604512
View directory record Official record
Conditions
Brain Cancer
Interventions
MRI perfusion and PET/CT scans
Diagnostic Test
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2023
U.S. locations
6
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Sep 3, 2026, 7:59 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Detecting Drugs of Abuse Via Exhaled Breath Samples Using Differential Mobility Spectrometry

NCT05384470
View directory record Official record
Conditions
Opiate Abuse, Marijuana Abuse, Diagnostic
Interventions
Marihuana, BID2 Instrument - breathalyzer
Drug · Device
Lead sponsor
Mclean Hospital
Other
Eligibility
21 Years to 50 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 1, 2025 · Synced Sep 3, 2026, 7:59 AM EDT
Completed No phase listed Observational

Metabolomics of Roux-en-Y Gastric Bypass (RYGB) With Gastrostomy

NCT00887302
View directory record Official record
Conditions
Type II Diabetes Mellitus, Obesity
Interventions
Gastric Band, Gastric Sleeve, Gastrostomy Tube
Procedure
Lead sponsor
East Carolina University
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Greenville, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 5, 2023 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Does Portion Size Influence Intake of Low-Energy-Dense Foods in Preschool-aged Children?

NCT00936507
View directory record Official record
Conditions
Caloric Intake
Interventions
Energy Density/Portion Size
Other
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
3 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM EDT
Terminated Not applicable Interventional

Effects of Varying Portion Size and Palatability on Food Intake of Preschool Children

NCT03643250
View directory record Official record
Conditions
Feeding Behavior
Interventions
Smaller Portion Size and Standard Appeal (non-divided plate), Smaller Portion Size and Enhanced Appeal (divided plate), Larger Portion Size and Standard Appeal (non-divided plate), Larger Portion Size and Enhanced Appeal (divided plate), Smaller Portion Size and Standard Appeal (divided plate)
Other
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 5 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 21, 2019 · Synced Sep 3, 2026, 7:59 AM EDT
Terminated Not applicable Interventional

Crural Dissection in Sleeve Gastrectomy

NCT04168060
View directory record Official record
Conditions
Sleeve Gastrectomy
Interventions
Crura dissection, Sleeve gastrectomy, Hiatal hernia repair
Procedure
Lead sponsor
University of Miami
Other
Eligibility
18 Years to 69 Years
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2025
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jun 2, 2025 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pain Sensitivity During Puberty

NCT05145595
View directory record Official record
Conditions
Pain
Interventions
Thermal Sensory Analyzer, Pressure Stimuli, Mechanical Stimuli, Pain Ratings, Thermal pain thresholds, Pressure pain thresholds (PPT), Mechanical temporal summation, Conditioned pain modulation (CPM) efficiency, Offset analgesia efficiency, Cold pain tolerance
Device · Behavioral
Lead sponsor
Washington University School of Medicine
Other
Eligibility
9 Years to 16 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Sep 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional

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

NCT05266183
View directory record Official record
Conditions
Eating Behavior
Interventions
Simultaneous Variety, Single-Food, Small Portion, Large Portion
Other
Lead sponsor
Penn State University
Other
Eligibility
20 Years to 65 Years · Female only
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 9, 2022 · Synced Sep 3, 2026, 7:59 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Energy Density and Portion Size of Milk in Preschool Children

NCT02755558
View directory record Official record
Conditions
Feeding Behaviors
Interventions
Low energy density, High energy density, Small portion, Large portion
Behavioral
Lead sponsor
Penn State University
Other
Eligibility
3 Years to 6 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 20, 2017 · Synced Sep 3, 2026, 7:59 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Promoting Healthier Food Purchases By Leveraging the Online-Grocery Environment

NCT02489396
View directory record Official record
Conditions
Obesity
Interventions
Nutrition facts automatically or not automatically displayed, Nutrition facts in color, Nutrition Facts Label in Larger Font, Healthier Items First
Behavioral
Lead sponsor
University of Vermont
Other
Eligibility
Not listed
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Sep 3, 2026, 7:59 AM 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 3, 2026, 7:59 AM EDT
Terminated Not applicable Interventional

Hiatal Interrogation in Sleeve Gastrectomy

NCT03527810
View directory record Official record
Conditions
Sleeve Gastrectomy
Interventions
Sleeve Gastrectomy Without Interrogation of Hiatus, Sleeve Gastrectomy With Interrogation of Hiatus
Procedure
Lead sponsor
Miguel Burch
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 31, 2022 · Synced Sep 3, 2026, 7:59 AM EDT