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Showing 1–24 of 52 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Dietary fiber supplementation Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Impact of a Nutritional Supplement on Metabolic Health

NCT02239198
View directory record Official record
Conditions
Cardiovascular Disease Prevention
Interventions
Nutrition bar
Other
Lead sponsor
UCSF Benioff Children's Hospital Oakland
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Oakland, California
Source: ClinicalTrials.gov public record
Updated Apr 17, 2017 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Fiber Blends and Gut Microbiota (FB)

NCT04101344
View directory record Official record
Conditions
Gut Microbiome
Interventions
Two fiber-blend snack and four fiber-blend snack
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 26, 2024 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Phase 2 Interventional

A Clinical Trial of Soluble Fiber for Asthma

NCT06372249
View directory record Official record
Conditions
Asthma in Children
Interventions
Inulin
Drug
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
6 Years to 17 Years
Enrollment
105 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional

Investigation of Medical Management to Prevent Episodes of Diverticulitis Trial

NCT05681559
View directory record Official record
Conditions
Diverticulitis
Interventions
Medi for All, Standard Fiber Supplementation
Behavioral · Dietary Supplement
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 11, 2026 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Feasibility and Colorectal Benefits of Pulses Supplementation

NCT06032104
View directory record Official record
Conditions
Colorectal Polyp, Obesity
Interventions
Dry beans, Usual diet
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 80 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Phase 2 Interventional

Soluble Corn Fiber Supplementation for Asthma

NCT03673618
View directory record Official record
Conditions
Asthma in Children
Interventions
Soluble Corn Fiber
Drug
Lead sponsor
Phoenix Children's Hospital
Other
Eligibility
6 Years to 17 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 30, 2023 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Vitamin D Supplementation and Muscle Function in Older Adults

NCT02015611
View directory record Official record
Conditions
Neuromuscular Function
Interventions
Vitamin D, Placebo
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
65 Years to 89 Years
Enrollment
136 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Nov 14, 2022 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of Pea Hull Fibre Supplementation

NCT02778230
View directory record Official record
Conditions
Healthy
Interventions
Pea Fiber, Control
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
60 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 4, 2019 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

How Does a Synbiotic Supplement Affect Iron Status During Iron Repletion in Iron Depleted Female Athletes?

NCT03793959
View directory record Official record
Conditions
Iron-deficiency
Interventions
Synbiotic Supplement, Placebo
Dietary Supplement
Lead sponsor
Marywood University
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Scranton, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 3, 2019 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Alpha Lipoic Acid Supplementation on Metabolic Syndrome Markers in Young Overweight or Obese Males

NCT03342599
View directory record Official record
Conditions
Metabolic Syndrome, Obesity
Interventions
Alpha Lipoic Acid Supplement, Placebo
Dietary Supplement
Lead sponsor
University of La Verne
Other
Eligibility
18 Years to 35 Years · Male only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2016
U.S. locations
1
States / cities
La Verne, California
Source: ClinicalTrials.gov public record
Updated Nov 16, 2017 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional

Fiber Supplementation in Heart Failure With Preserved Ejection Fraction (HFpEF)

NCT06337812
View directory record Official record
Conditions
Type2diabetes, Heart Failure With Preserved Ejection Fraction
Interventions
Potato Starch
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 23, 2025 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Integrative Personal Omics Profiling for Dynamic Molecular Phenotypes Monitoring During Fiber Supplementation

NCT04706858
View directory record Official record
Conditions
Prebiotics
Interventions
Dietary fiber supplementation
Dietary Supplement
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 65 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Jan 12, 2021 · Synced Sep 20, 2026, 10:10 AM EDT
Not listed Not applicable Interventional

Immunonutrition in Ulcerative Colitis

NCT03594708
View directory record Official record
Conditions
Ulcerative Colitis
Interventions
Nutrition supplement, Placebo supplement
Dietary Supplement
Lead sponsor
Baptist Memorial Health Care Corporation
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 19, 2018 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Phase 2 Interventional Results available

Examining the Efficacy of Fecal Microbiota Transplantation (FMT) and Dietary Fiber in Patients With Ulcerative Colitis

NCT03998488
View directory record Official record
Conditions
Ulcerative Colitis, Inflammatory Bowel Diseases
Interventions
Fecal Microbiota Transplantation, Psyllium Husk Powder
Drug · Dietary Supplement
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 89 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 2, 2025 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional

Impact of Dietary Fiber Supplementation on Colonic Microbiome

NCT05643859
View directory record Official record
Conditions
Benign Colorectal Neoplasm, Non-Neoplastic Anal Disorder
Interventions
Dietary Fiber, Proctoscopy or anoscopy with Biopsy, Colonoscopy, Questionnaire Administration
Dietary Supplement · Procedure · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional

Effect of Fiber Supplementation on the Need for Medication With Gestational Diabetes

NCT06867861
View directory record Official record
Conditions
Gestational Diabetes Mellitus (GDM)
Interventions
Fiber
Dietary Supplement
Lead sponsor
Eastern Virginia Medical School
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
110 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 9, 2025 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Smart Underwear to Measure Diet-Induced Hydrogen Sulfide Production

NCT06802276
View directory record Official record
Conditions
Hydrogen Sulfide, Gastrointestinal Microbiome
Interventions
High Cysteine Diet, Low Cysteine Diet
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Efficacy of Pea Hull Fiber - Phase 2

NCT03016065
View directory record Official record
Conditions
Healthy
Interventions
Pea Fiber, Control
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
8 Years to 15 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 28, 2022 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Clinical Trial to Evaluate the Effects of a Chickpea Pasta on Gut Health, Blood Glucose, and Overall Health

NCT07264465
View directory record Official record
Conditions
Gut Health, Gastrointestinal Health
Interventions
Chickpea Pasta
Dietary Supplement
Lead sponsor
Banza LLC
Industry
Eligibility
21 Years to 44 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Dec 3, 2025 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Phase 1 Interventional

Fecal Microbiota Transplant and Dietary Fiber Supplementation for the Treatment of Gut Graft Versus Host Disease

NCT05067595
View directory record Official record
Conditions
Intestinal Graft Versus Host Disease
Interventions
Colonoscopy, Fecal Microbiota Transplantation, Nutritional Supplementation, Survey Administration, Biospecimen Collection
Procedure · Biological · Dietary Supplement + 1 more
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 10, 2026 · Synced Sep 20, 2026, 10:10 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

The Effect of Oral Alpha-Cyclodextrin on Fecal Fat Excretion

NCT01910558
View directory record Official record
Conditions
Obesity, Cardiovascular Disease
Interventions
Alpha-cyclodextrin and digestible starch, Alpha-cyclodextrin, Digestible starch
Dietary Supplement
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Apr 26, 2016 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Pea Fiber Supplementation on the Gut Microbiota and Host Metabolome and Proteome (FIB)

NCT04159259
View directory record Official record
Conditions
Microbial Colonization
Interventions
Low fiber diet, Pea Fiber Bar
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 26, 2024 · Synced Sep 20, 2026, 10:10 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Metabolic Effects of Short Term Sugarcane Bagasse Supplementation

NCT01830686
View directory record Official record
Conditions
Insulin Resistance
Interventions
Sugarcane bagasse, Non-caloric, non-fermentable fiber, Minimal fiber
Other
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 50 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Source: ClinicalTrials.gov public record
Updated Feb 2, 2016 · Synced Sep 20, 2026, 10:10 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Short-Term Effects of Multi-Fiber Supplementation on Gut Health

NCT07787026
View directory record Official record
Conditions
Mixed Fiber Supplementation for Healthy Adults
Interventions
Prebiotic, Placebo
Dietary Supplement
Lead sponsor
Brown University
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 20, 2026, 10:10 AM EDT