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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Food portion size Clear all
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 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of the Snackability Smartphone Application to Improve Quality of the Snack Intake, General Diet Quality, and Weight Among College Students

NCT05302830
View directory record Official record
Conditions
Obesity, Diet, Healthy
Interventions
Snackability app, Control group
Behavioral
Lead sponsor
Florida International University
Other
Eligibility
18 Years to 24 Years
Enrollment
272 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 12, 2023 · Synced Sep 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional

Exercise Dose-Response Effects in Prediabetes

NCT00962962
View directory record Official record
Conditions
Pre-Diabetes
Interventions
Aerobic Exercise, Exercise and Diet
Behavioral
Lead sponsor
Duke University
Other
Eligibility
45 Years to 75 Years
Enrollment
288 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 14, 2014 · Synced Sep 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Foundations for Health

NCT01304615
View directory record Official record
Conditions
Overweight, Obese
Interventions
Decrease Energy Density of the Diet, Increase Steps per Day, Consumption of Self-made Meals
Behavioral
Lead sponsor
The University of Tennessee, Knoxville
Other
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Knoxville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 4, 2018 · Synced Sep 25, 2026, 10:42 AM EDT
Completed Phase 2 Interventional Results available

Effect of a Wide Spectrum Nutritional Supplement on Mitochondrial Function in Children With Autism Spectrum Disorder

NCT03835117
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
Wide-spectrum nutritional supplement, Placebo
Drug · Other
Lead sponsor
Rossignol Medical Center
Other
Eligibility
2 Years to 17 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional

Evaluation of Medicaid Food & Nutrition Support Program for Pregnant Women

NCT06368739
View directory record Official record
Conditions
Pregnancy Related, Financial Gift, Nutrition, Healthy
Interventions
Nurture program, Regular benefits
Behavioral · Other
Lead sponsor
University of Texas at Austin
Other
Eligibility
30 Years and older · Female only
Enrollment
224 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Corpus Christi, Texas
Source: ClinicalTrials.gov public record
Updated Mar 25, 2025 · Synced Sep 25, 2026, 10:42 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

RemI for Post-Bariatric Surgery Weight Regain

NCT06292936
View directory record Official record
Conditions
Obesity, Bariatric Surgery Candidate
Interventions
Acceptance-Based Behavioral Intervention
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years to 70 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
2
States / cities
Chicago, Illinois • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Sep 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Results available

Evaluation of an Artificial Intelligence-Assisted, Image-Based Dietary Assessment Tool in the Framingham Heart Study

NCT06455111
View directory record Official record
Conditions
Dietary Habits
Interventions
Keenoa, ASA24
Other
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
115 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 12, 2025 · Synced Sep 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Snack Food Reinforcement in Obese and Non-obese Women

NCT00837694
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
State University of New York at Buffalo
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Jul 31, 2019 · Synced Sep 25, 2026, 10:42 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

First-in-Human Study of VNT-101: Safety, Tolerability, and Pharmacokinetics

NCT07169318
View directory record Official record
Conditions
Influenza
Interventions
Placebo for VNT-101, VNT-101
Other · Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 59 Years
Enrollment
78 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 25, 2026, 10:42 AM 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 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Snacks, Smiles and Taste Preferences

NCT03631992
View directory record Official record
Conditions
Development, Child
Interventions
Low Sweet, Regular Sweet
Behavioral
Lead sponsor
Temple University
Other
Eligibility
3 Years to 6 Years
Enrollment
172 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
2
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 29, 2026 · Synced Sep 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Recruiting No phase listed Observational

EXploring Inflammation and Social deTerminants Study in Breast Cancer Patients

NCT07478016
View directory record Official record
Conditions
Breast Cancer, Ductal Carcinoma In Situ
Interventions
Survey Assessments, Diet Recall, Blood Biomarker Collection
Other
Lead sponsor
Thomas Jefferson University
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 25, 2026, 10:42 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 25, 2026, 10:42 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 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Food, Fun, & Fitness Internet Program for Girls: Outcome Evaluation

NCT01481948
View directory record Official record
Conditions
Obesity
Interventions
Food, Fun, & Fitness Internet Program for Girls
Behavioral
Lead sponsor
Baylor College of Medicine
Other
Eligibility
8 Years to 10 Years · Female only
Enrollment
342 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 19, 2016 · Synced Sep 25, 2026, 10:42 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 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Culturally Optimized Messages for Latinos

NCT05589740
View directory record Official record
Conditions
Diet, Healthy, Diet Habit, Obesity, Blood Pressure, Psychological
Interventions
Culturally tailored healthy eating advice, Standard healthy eating advice
Behavioral
Lead sponsor
Harvard School of Public Health (HSPH)
Other
Eligibility
25 Years to 65 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 2, 2024 · Synced Sep 25, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feeding, Fun, and Families Study

NCT03646201
View directory record Official record
Conditions
Childhood Obesity
Interventions
FFF
Behavioral
Lead sponsor
Temple University
Other
Eligibility
18 Years and older · Female only
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 23, 2018 · Synced Sep 25, 2026, 10:42 AM EDT