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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: High fiber diet Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Chitin-Glucan on Oxidized Low-Density Lipoprotein (LDL)

NCT01232309
View directory record Official record
Conditions
Cardiovascular
Interventions
Chitin-Glucan, Low Dose Chitin-Glucan, Low Dose Chitin-Glucan + Olive Extract, Placebo
Dietary Supplement
Lead sponsor
Stratum Nutrition
Industry
Eligibility
21 Years to 70 Years
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
2
States / cities
Addison, Illinois • Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Oct 22, 2012 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Trial to Assess the Effects of Diets With and Without Inulin on Energy Expenditure in Adults.

NCT06923332
View directory record Official record
Conditions
Healthy, Overweight or Obese Adults
Interventions
High Fiber bar with Inulin, Low fiber bar - no inulin
Other
Lead sponsor
Midwest Center for Metabolic and Cardiovascular Research
Other
Eligibility
18 Years to 65 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 24, 2025 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 4 Interventional

Empiric Versus Selective Prevention Strategies for Kidney Stone Disease

NCT05365477
View directory record Official record
Conditions
Kidney Stones, Nephrolithiasis
Interventions
Empiric Therapy: Diet, Empiric Therapy: Drug, Selective Therapy: Diet, Selective Therapy: Drug
Behavioral · Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Gut Kidney Axis in Enteric Hyperoxaluria

NCT05124886
View directory record Official record
Conditions
Enteric Hyperoxaluria
Interventions
Moderately High Oxalate (MOx) Diet
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2028
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 1 Interventional

Behavior-Based Dietary Intervention in Treating Patients With Hormone-Refractory Prostate Cancer

NCT00082732
View directory record Official record
Conditions
Prostate Cancer
Interventions
behavioral dietary intervention, dietary intervention, therapeutic dietary intervention
Behavioral · Dietary Supplement · Procedure
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
Male only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2006
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Nov 5, 2018 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Avocado and Postprandial Responses

NCT06818032
View directory record Official record
Conditions
Healthy, Healthy Volunteer, Healthy Volunteers, Healthy Adult, Healthy Male and Female Subjects, Healthy Subjects, Healthy Volunteers Only, Healthy Non-smokers
Interventions
Negative control, Avocado, Fat and fiber addition
Other
Lead sponsor
University of Vermont Medical Center
Other
Eligibility
21 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Burlington, Vermont
Source: ClinicalTrials.gov public record
Updated Jul 21, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

Efficacy and Safety of the DASH Diet in Adults With Moderate Chronic Kidney Disease: Pilot Study

NCT02059811
View directory record Official record
Conditions
Hypertension, Chronic Kidney Disease
Interventions
DASH Diet, Control Diet
Other
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 2, 2014 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Glycemic Response to High Amylose Rice

NCT01685879
View directory record Official record
Conditions
Diabetes Treatment (Pilot Study)
Interventions
Rice, Glucose Beverage
Other
Lead sponsor
University of Hawaii
Other
Eligibility
18 Years to 40 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Aug 31, 2014 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 3 Interventional Results available

Second Line Induction Therapy and Healthy Diet for Patients With Ulcerative Colitis

NCT04505410
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
A plant based high fiber diet that mimics fasting ("FMD") plus advanced therapy, Advanced therapy only without dietary intervention
Other · Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 27, 2025 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Thermic & Lipemic Properties of Dietary Carbohydrates

NCT01354574
View directory record Official record
Conditions
Exogenous Obesity, Dietary Modification
Interventions
High Glycemic Index meals, Low Glycemic Index meals
Other
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 48 Years · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2005
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Jul 12, 2011 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Breakfast Consumption in Preschoolers: Satiety, Diet Quality and Memory

NCT02122224
View directory record Official record
Conditions
Lack of Satiety, Dietary Modification, Memory Deficits, Obesity
Interventions
High fiber breakfast, High Protein Breakfast, High Protein/High Fiber Breakfast
Other
Lead sponsor
Purdue University
Other
Eligibility
4 Years to 5 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Jan 11, 2018 · Synced Sep 24, 2026, 4:30 AM EDT
Not yet recruiting Not applicable Interventional

The High Fiber Program to Increase Fiber Intake Among Patients Undergoing Allogeneic Hematopoietic Cell Transplant

NCT07664670
View directory record Official record
Conditions
Hematopoietic and Lymphatic System Neoplasm
Interventions
Biospecimen Collection, Dietary Intervention, Questionnaire Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2028
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed No phase listed Observational

Women's Healthy Eating and Living Study

NCT00003787
View directory record Official record
Conditions
Breast Cancer
Interventions
educational/counseling intervention, therapeutic dietary intervention
Behavioral
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years to 70 Years · Female only
Enrollment
3,088 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1995 – 2018
U.S. locations
7
States / cities
Tucson, Arizona • La Jolla, California • Oakland, California + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2019 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet Modulation of Bacterial Sulfur and Bile Acid Metabolism and Colon Cancer Risk

NCT03550885
View directory record Official record
Conditions
Colorectal Cancer
Interventions
High taurine and saturated fat diet, Low in taurine and saturated fat diet
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

Dietary Interventions in Prediabetes

NCT01729078
View directory record Official record
Conditions
Impaired Fasting Glucose, Pre Diabetes, Liver Fat
Interventions
Dietary intervention
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
30 Years to 80 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 28, 2015 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional

A Simple Dietary Message to Improve Dietary Quality for Metabolic Syndrome

NCT00911885
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Dietary Intervention
Behavioral
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
21 Years to 70 Years
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2015
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 17, 2015 · Synced Sep 24, 2026, 4:30 AM EDT
Terminated Not applicable Interventional

Study of Dietary Composition in Crohn's Disease

NCT04431700
View directory record Official record
Conditions
Inflammatory Bowel Diseases, Crohn Disease
Interventions
Anti-inflammatory diet, Regular diet
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 75 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Eggs on Postprandial Metabolism

NCT01351207
View directory record Official record
Conditions
Healthy
Interventions
Eggs
Other
Lead sponsor
Tufts University
Other
Eligibility
50 Years to 70 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 18, 2014 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Phase 2 Interventional

A Pilot Study of the Effects of Diet and Behavioral Interventions on Health in Diabetics

NCT01713764
View directory record Official record
Conditions
Diabetes Type II
Interventions
Low Carbohydrate Diet, American Diabetes Association Diet, Mindfulness and Positive Affect Skills
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Dec 29, 2013 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Mechanisms of Obesity and Its Metabolic Complications in Youth

NCT03454828
View directory record Official record
Conditions
Obesity, Childhood
Interventions
obese carbohydrate diet, lean carbohydrate diet
Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
15 Years to 21 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 8, 2025 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Early Phase 1 Interventional

Effect of High-Legume Diet on Colorectal Cancer Risk

NCT00339469
View directory record Official record
Conditions
Inflammation, Prevention and Control, Colonic Neoplasms, Diet, Insulin
Interventions
LIFE
Dietary Supplement
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
35 Years to 75 Years · Male only
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2018
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 15, 2019 · Synced Sep 24, 2026, 4:30 AM EDT
Active, not recruiting Not applicable Interventional

Fiber-rich Foods to Treat Obesity and Prevent Colon Cancer

NCT04780477
View directory record Official record
Conditions
Colon Cancer, Obesity
Interventions
High Fiber Diet Featuring Legumes (HLD), Healthy American Diet
Dietary Supplement
Lead sponsor
Emory University
Other
Eligibility
40 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hunger and Learning Study in Preschoolers

NCT03861208
View directory record Official record
Conditions
Hunger, Ingestive Behavior, Obesity, Food Preferences
Interventions
diet, usual diet
Other
Lead sponsor
University of Virginia
Other
Eligibility
3 Years to 4 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 17, 2024 · Synced Sep 24, 2026, 4:30 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fermented and Fiber-rich Food (FeFiFo) Study

NCT03275662
View directory record Official record
Conditions
Metabolic Syndrome, Microbiome, Immune Function, Inflammation
Interventions
Dietary Fiber, Fermented Foods
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Feb 23, 2023 · Synced Sep 24, 2026, 4:30 AM EDT