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Showing 1–24 of 38 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Food Frequency Questionnaire Clear all
Completed No phase listed Observational

Dietary Intake in Adults From the GA2LEN Folow-up Survey

NCT03251157
View directory record Official record
Conditions
Asthma, Lung Function Decreased, Food Allergy, Allergic Sensitisation, Allergic Rhinitis, COPD, Atopy
Interventions
Dietary intake of various nutrients, foods and biocompounds
Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
15 Years to 75 Years
Enrollment
3,500 participants
Timeline
2007 – 2010
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 15, 2017 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional

Pilot Study of Curcumin for Women With Obesity and High Risk for Breast Cancer

NCT01975363
View directory record Official record
Conditions
Atypical Ductal Breast Hyperplasia, BRCA1 Gene Mutation, BRCA2 Gene Mutation, Ductal Breast Carcinoma in Situ, Lobular Breast Carcinoma in Situ
Interventions
curcumin, Biomarker analysis, Assessment of Dietary Intake, Daily Log
Dietary Supplement · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
19 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 29, 2019 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional

A Low AGE (Advanced Glycation End-product) Dietary Intervention for Breast Cancer Survivors

NCT05265715
View directory record Official record
Conditions
Breast Cancer
Interventions
Low AGE diet, Research blood draw
Other · Procedure
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older · Female only
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional

Remotely Delivered Behavioral Weight Loss Using an Ad Libitum Plant-Based Diet Versus a Balanced Calorie Deficit Diet

NCT05337150
View directory record Official record
Conditions
Obesity, Overweight
Interventions
Lifestyle Modification Intervention, Balanced Calorie Deficit Eating Plan, Ad Libitum Whole Food Plant-Based Eating Plan
Behavioral
Lead sponsor
Drexel University
Other
Eligibility
18 Years to 75 Years
Enrollment
55 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 13, 2023 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Baby-Feed Web Application for Infant Caregivers to Improve Diets and Weight Gain

NCT05990439
View directory record Official record
Conditions
Obesity, Childhood
Interventions
Baby-Feed, Limited access to the Baby-Feed web application
Behavioral
Lead sponsor
Florida International University
Other
Eligibility
1 Month to 3 Months
Enrollment
155 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Internet-Based and Self-Reports in Assessing Diet and Physical Activity Within AARP

NCT03268577
View directory record Official record
Conditions
Healthy Subject
Interventions
Internet-Based Intervention, Monitoring Device, Questionnaire Administration
Other · Device
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
50 Years to 74 Years
Enrollment
1,130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Rockville, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational

Fiber Intake in an End Stage Renal Disease (ESRD) Population Followed Over 2 Years

NCT00874380
View directory record Official record
Conditions
Cardiovascular Outcome, Kalemia Control, Lipid Profile
Interventions
Increasing total fiber intake in patient's diet
Other
Lead sponsor
Northwell Health
Other
Eligibility
Not listed
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Staten Island, New York
Source: ClinicalTrials.gov public record
Updated May 14, 2013 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Predictive Value of Coronary Heart Disease (CHD) Biomarkers for CHD Death

NCT01864122
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Not listed
Lead sponsor
Tufts University
Other
Eligibility
65 Years and older · Female only
Enrollment
2,448 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 5, 2025 · Synced Sep 2, 2026, 4:24 AM EDT
Active, not recruiting Not applicable Interventional

High-Fermented Food Intervention Among Locally Advanced Rectal Cancer Patients (The FEED Trial)

NCT06337552
View directory record Official record
Conditions
Rectal Cancer, Non-Small Cell Lung Cancer
Interventions
FEED-FF, Standard of Care (SUC)
Other
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Sep 2, 2026, 4:24 AM EDT
Terminated Not applicable Interventional

Piloting Diet and Exercise Interventions in Older Hispanics With Diabetes

NCT04132739
View directory record Official record
Conditions
Diabetes, Senior Syndrome, Frailty
Interventions
Diet, Exercise, Diet and exercise
Behavioral
Lead sponsor
Florida International University
Other
Eligibility
60 Years and older
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
4
States / cities
Miami, Florida • Sweetwater, Florida
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Sep 2, 2026, 4:24 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Exogenous and Endogenous Risk Factors for Early-onset Colorectal Cancer

NCT05732623
View directory record Official record
Conditions
Colorectal Cancer, Early Onset Colorectal Cancer, Diet Habit, Risk Reduction
Interventions
Semi Quantitative Food Frequency Questionnaire (SQFFQ)
Behavioral
Lead sponsor
San Raffaele University
Other
Eligibility
18 Years to 49 Years
Enrollment
2,300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2035
U.S. locations
2
States / cities
Denver, Colorado • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Sep 2, 2026, 4:24 AM EDT
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Advancing Prevention of Pulmonary Fibrosis

NCT04564183
View directory record Official record
Conditions
IPF, Pulmonary Fibrosis, ILD
Interventions
Sample collection, Questionnaires, High resolution CT scan of the chest, Pulmonary Function Test
Other · Radiation · Diagnostic Test
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 75 Years
Enrollment
800 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Environmental and Genetic Risk Factors for Pediatric Multiple Sclerosis

NCT01396343
View directory record Official record
Conditions
Pediatric Multiple Sclerosis
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
3 Years to 21 Years
Enrollment
1,276 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2018
U.S. locations
17
States / cities
Birmingham, Alabama • San Bernardino, California • San Francisco, California + 13 more
Source: ClinicalTrials.gov public record
Updated Oct 17, 2018 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational

UF-BMT-HSCT-001: A Non-Interventional Study Evaluating Diet in HSCT Survivors

NCT03377010
View directory record Official record
Conditions
Hematopoietic Neoplasm
Interventions
Dietary intake -Food Frequency Questionnaire, Receptivity to Participating in Diet Interventions
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 16, 2019 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect a Honey, Spice-blended Baked Good Has on Salivary Inflammation Markers in Adults: a Pilot Study

NCT05055362
View directory record Official record
Conditions
Chronic Kidney Diseases, Overweight and Obesity
Interventions
Honey Spice Group
Other
Lead sponsor
University of Florida
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 9, 2024 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Magnesium Food Frequency Questionnaire

NCT03470519
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
Drexel University
Other
Eligibility
20 Years to 75 Years
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 14, 2019 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional

Individualized Diet Improvement Program for Weight Loss and Maintenance, Cohort 1

NCT04605653
View directory record Official record
Conditions
Obesity, Overweight, Weight Loss, Diet Habit
Interventions
Weight Management Intervention
Behavioral
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 64 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 2, 2020 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Screening and Risk Factors of Colon Neoplasia

NCT01647776
View directory record Official record
Conditions
Colon Cancer
Interventions
Stool DNA Test, biopsies of rectal and colon mucosa, Questionnaires
Other · Procedure
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
30 Years to 80 Years
Enrollment
3,315 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 8, 2021 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Gut Microbiota Composition in Hispanic and Non-Hispanic Children.

NCT03990350
View directory record Official record
Conditions
Obesity
Interventions
Fecal Sample Collection, Physical Activity Questionnaire, Food Frequency Questionnaire, 24-hour dietary recall diary
Other
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
6 Years to 12 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 29, 2020 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional

The MONITOR Study: Remote Monitoring Of a Nutrition Intervention To Optimize Treatment Response

NCT06050395
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
Quality fo Life Questionnaire (FHSI), Vioscreen Food Frequency Questionnaire (FFQ), Educational Handouts, NutritionCoaching, Follow-Up Survey, Functional Assessment of Anorexia/Cachexia Treatment (FAACT) Questionnaire, Patient Reported Outcomes Measure- Cognitive Function (PROMIS-Cog) Questionnaire
Behavioral
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jun 25, 2026 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Dietary Fish and Omega 3 Fatty Acids for Breast Cancer Prevention

NCT01282580
View directory record Official record
Conditions
Breast Cancer
Interventions
Lovaza-Omega 3 fatty acid capsules, Dietary fish (canned salmon, albacore)
Dietary Supplement · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2014
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 29, 2019 · Synced Sep 2, 2026, 4:24 AM EDT
Not listed Not applicable Interventional

EMPOWER Weight Management

NCT04635722
View directory record Official record
Conditions
Obesity, Overweight, Weight Loss, Diet Habit
Interventions
Weight Management Intervention
Behavioral
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
18 Years to 75 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 12, 2023 · Synced Sep 2, 2026, 4:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Storytelling To Prevent Obesity and Encourage Responsive Feeding Practices in Young Children

NCT05994924
View directory record Official record
Conditions
Obesity, Childhood
Interventions
Educational Handout, Video Series, Group Discussion Sessions
Behavioral
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 2, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Assessing Diet, Stress Scores, and Other Health Metrics in Healthy Northern California Adults

NCT07265648
View directory record Official record
Conditions
Chronic Stress, Stool Frequency, Food Allergies, Diet Surveys, Demographic Data
Interventions
Online Survey
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Sep 2, 2026, 4:24 AM EDT