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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Meal portion size Clear all
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 28, 2026, 1:38 AM EDT
Completed 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
293 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 Sep 9, 2026 · Synced Sep 28, 2026, 1:38 AM 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 28, 2026, 1:38 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 28, 2026, 1:38 AM 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 Sep 23, 2026 · Synced Sep 28, 2026, 1:38 AM EDT
Completed Not applicable Interventional

PACIFIC: Providing Adults Collaborative Interventions For Ideal Changes

NCT02516839
View directory record Official record
Conditions
Overweight, Obesity
Interventions
Regulation of Cues (ROC), Behavioral Weight Loss (BWL), BWL + ROC, Nutrition Education, Stress Management and Social Support
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
271 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Mar 24, 2020 · Synced Sep 28, 2026, 1:38 AM EDT
Not yet recruiting Not applicable Interventional

Small Changes Clinical Weight Loss Trial

NCT06668272
View directory record Official record
Conditions
Obesity
Interventions
Small Changes program, Standard behavioral therapy for weight loss
Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 70 Years
Enrollment
52 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
2
States / cities
Houston, Texas • Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Oct 30, 2024 · Synced Sep 28, 2026, 1:38 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Healthy Mom Zone Gestational Weight Gain Management Intervention 2.0

NCT05807594
View directory record Official record
Conditions
Gestational Weight Gain, Overweight and Obesity, Pregnancy, Energy Balance
Interventions
HMZ 2.0 Intervention, Attention Control Intervention
Behavioral
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
144 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Sep 28, 2026, 1:38 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Time-restricted Eating Versus Daily Continuous Calorie Restriction on Body Weight and Colorectal Cancer Risk Markers

NCT05114798
View directory record Official record
Conditions
Time Restricted Eating, Obesity, Weight Loss, Colorectal Cancer
Interventions
Time restricted eating, Calorie Restriction
Behavioral
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years to 70 Years
Enrollment
194 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 20, 2026 · Synced Sep 28, 2026, 1:38 AM 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 28, 2026, 1:38 AM 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 28, 2026, 1:38 AM EDT
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 28, 2026, 1:38 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Brain Mechanisms of Overeating in Children

NCT03341247
View directory record Official record
Conditions
Pediatric Obesity, Inhibition, Decision Making, fMRI
Interventions
Not listed
Lead sponsor
Penn State University
Other
Eligibility
7 Years to 8 Years
Enrollment
254 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2023
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 2, 2024 · Synced Sep 28, 2026, 1:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Investigation Into the Effects of Blood Glucose Levels Upon Eating Behavior in Lean and Obese Non-diabetic and Diabetic Subjects

NCT02673203
View directory record Official record
Conditions
Diabetes
Interventions
Continuous Glucose Monitoring System (CGMS), Food log
Device · Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated May 4, 2022 · Synced Sep 28, 2026, 1:38 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 28, 2026, 1:38 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 28, 2026, 1:38 AM 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 28, 2026, 1:38 AM EDT
Completed Not applicable Interventional Results available

Novel Executive Function Training for Obesity

NCT03724396
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Behavioral Weight Loss - BWL, Novel Executive Function Training - NEXT
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 65 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Feb 14, 2024 · Synced Sep 28, 2026, 1:38 AM 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 28, 2026, 1:38 AM EDT
Active, not recruiting Not applicable Interventional

Miro-randomized Trial for Optimizing a JITAI to Reduce Dietary Lapses in Obesity Treatment

NCT04784585
View directory record Official record
Conditions
Obesity
Interventions
JITAI Enhanced Education Intervention Option, JITAI Self-Efficacy Intervention Option, JITAI Motivation Intervention Option, JITAI Self-Regulation Intervention Option, JITAI Generic Risk Alert Intervention Option (Active Comparator), Online Behavioral Obesity Treatment, JITAI No Treatment Intervention Option
Behavioral
Lead sponsor
The Miriam Hospital
Other
Eligibility
18 Years to 70 Years
Enrollment
204 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 28, 2026, 1:38 AM EDT
Completed Not applicable Interventional

Walnut Ingestion in Adults at Risk for Diabetes: Effects on Body Composition, Diet Quality, and Cardiac Risk Measures

NCT02330848
View directory record Official record
Conditions
Diabetes
Interventions
Walnut Ad libitum diet, Walnut Calorie controlled
Dietary Supplement
Lead sponsor
Griffin Hospital
Other
Eligibility
25 Years to 75 Years
Enrollment
112 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Derby, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 25, 2020 · Synced Sep 28, 2026, 1:38 AM EDT
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 28, 2026, 1:38 AM 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 28, 2026, 1:38 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Validity of an AI-based Program to Identify Foods and Estimate Food Portion Size

NCT05343585
View directory record Official record
Conditions
Nutrition Assessment
Interventions
PortionSize AI
Device
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 62 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 17, 2023 · Synced Sep 28, 2026, 1:38 AM EDT