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Showing 1–24 of 113 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Fiber supplement Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Assessing the Dose Response of a Lead Fiber Snack Prototype

NCT04729816
View directory record Official record
Conditions
Microbiota, Gastrointestinal Microbiome
Interventions
Controlled, high fat/low fiber diet background diet, sequentially supplemented with an escalating dose of a fiber-blend snack food.
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 26, 2024 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of 6-week Strawberry Supplementation on Insulin Action (STR2)

NCT01457612
View directory record Official record
Conditions
Insulin Resistance, Nutritional Disease, Metabolic Disease
Interventions
Strawberry, Placebo1, Placebo2
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2013
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 7, 2023 · Synced Sep 10, 2026, 12:50 AM EDT
Active, not recruiting Not applicable Interventional

Ritual Synbiotic+, a Dietary Supplement Designed to Impact Gastrointestinal Health, Mood, and Behavior in Women

NCT06834984
View directory record Official record
Conditions
Gastrointestinal Disease Symptoms
Interventions
Prebiotic, probiotic, postbiotic combination, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
25 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 23, 2026 · Synced Sep 10, 2026, 12:50 AM EDT
Active, not recruiting Not applicable Interventional

Prebiotic Treatment in People With Schizophrenia

NCT05527210
View directory record Official record
Conditions
Schizophrenia, Schizoaffective Disorder
Interventions
Prebiotic, Placebo Prebiotic
Dietary Supplement
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 60 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Creatine Use and Muscle Stretching in Peripheral Artery Disease

NCT04471792
View directory record Official record
Conditions
Peripheral Arterial Disease
Interventions
Creatine monohydrate, Cellulose
Drug · Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
40 Years to 95 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Dec 7, 2025 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional

Fiber Supplementation After Bariatric Surgery

NCT05653648
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Potato starch
Dietary Supplement
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Sep 10, 2026, 12:50 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

The Role of Resistant Starch in COVID-19 Infection

NCT04342689
View directory record Official record
Conditions
COVID-19
Interventions
Dietary Supplement containing resistant starch, Placebo Starch
Drug · Dietary Supplement
Lead sponsor
Yale University
Other
Eligibility
19 Years and older
Enrollment
226 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
2
States / cities
New Haven, Connecticut • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 4, 2022 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Preoperative Fiber on Postoperative Bowel Function

NCT04882995
View directory record Official record
Conditions
Constipation, Prolapse, Vaginal
Interventions
Psyillium fiber
Dietary Supplement
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older · Female only
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 27, 2022 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Results available

Brain Energy for Amyloid Transformation in Alzheimer's Disease Study

NCT03472664
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment
Interventions
low carbohydrate/high fat diet, low fat/high carbohydrate diet
Other
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
55 Years to 85 Years
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 2, 2026 · Synced Sep 10, 2026, 12:50 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Berries, Inflammation, and Gut Microbiome

NCT04100200
View directory record Official record
Conditions
Overweight or Obesity, Healthy
Interventions
Mixed berries, FOS, Control, Combination
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
20 Years to 60 Years
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional

Effect of Gum Arabic on Gastrointestinal Transit and Permeability

NCT03742076
View directory record Official record
Conditions
Diverticulitis
Interventions
High-dose prebiotic, Low-dose prebiotic, Placebo
Dietary Supplement
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 9, 2023 · Synced Sep 10, 2026, 12:50 AM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Supplements for Controlling Resistance to Insulin

NCT00699413
View directory record Official record
Conditions
Obesity, Diabetes Mellitus, Type 2
Interventions
nutrition education plus active supplement, nutrition education plus inactive supplement
Drug
Lead sponsor
University of Southern California
Other
Eligibility
13 Years to 17 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jun 10, 2024 · Synced Sep 10, 2026, 12:50 AM EDT
Recruiting Not applicable Interventional

Type 1 Diabetes Management Using a Very Low Carbohydrate Versus Standard Diet

NCT03710928
View directory record Official record
Conditions
Type1diabetes
Interventions
very low carbohydrate diet, standard carbohydrate diet
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 17, 2024 · Synced Sep 10, 2026, 12:50 AM EDT
Recruiting Not applicable Interventional

Study Using Prebiotics to Improve Gut Microbiome Diversity After Autologous Cellular Therapy

NCT05135351
View directory record Official record
Conditions
Multiple Myeloma, Lymphoma
Interventions
Resistant Starch, Maltodextrin
Dietary Supplement
Lead sponsor
University of Nebraska
Other
Eligibility
19 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Jul 26, 2026 · Synced Sep 10, 2026, 12:50 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 10, 2026, 12:50 AM EDT
Not listed Not applicable Interventional

Gut Microbiome and p-Inulin in CKD - TarGut CKD Study

NCT03348592
View directory record Official record
Conditions
Chronic Kidney Diseases
Interventions
Oligofructose-enriched inulin (p-inulin), No treatment
Dietary Supplement · Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Nov 20, 2017 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional

BCAA Supplemental Study

NCT03339232
View directory record Official record
Conditions
Cirrhosis
Interventions
BCAA Supplement, Physical Activity
Dietary Supplement · Other
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 23, 2020 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional

Prebiotics, Gut Microbiota, and Cardiometabolic Health

NCT02346838
View directory record Official record
Conditions
Prediabetes
Interventions
Inulin, Placebo
Dietary Supplement
Lead sponsor
Virginia Polytechnic Institute and State University
Other
Eligibility
40 Years to 70 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Blacksburg, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Compare Effects of a Soluble Fiber on Weight and Blood Cholesterol

NCT00682916
View directory record Official record
Conditions
Obesity
Interventions
Y288
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Prebiotics on Cognition and Health

NCT04551937
View directory record Official record
Conditions
Physiological Stress, Cognitive Change, Gastrointestinal Health
Interventions
Lactose Free 1% Milk, Lactose Free 1% Milk + 10 g prebiotic
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
25 Years to 45 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Sep 15, 2020 · Synced Sep 10, 2026, 12:50 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Satiety Response After Mixed Fiber Doses

NCT00889993
View directory record Official record
Conditions
Satiety
Interventions
Mixed Fiber Supplement
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2008
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 28, 2012 · Synced Sep 10, 2026, 12:50 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 10, 2026, 12:50 AM EDT
Completed Phase 1 Interventional

Nutrition, Neuromuscular Electrical Stimulation (NMES) and Secondary Progressive Multiple Sclerosis (SPMS)

NCT01381354
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Progressive exercise, Neuromuscular electrical stimulation delivered using the electrical therapy device EMPI 300 PV, Modified paleolithic diet, Omega 3 fatty acids, Full Spectrum vitamin, Essential - hydroxytyrosol, Maltodextrin fiber supplement, Mineral boost (magnesium), Niacinamide, Methyl B12, Taurine, creatine, thiamine, riboflavin, N acetylcysteine, alpha lipoic acid, L acetyl carnitine, methyl folate, coenzyme Q, meditation, self massage, learning, Coconut oil
Other · Device · Dietary Supplement + 1 more
Lead sponsor
University of Iowa
Other
Eligibility
18 Years to 65 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2016
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jun 25, 2018 · Synced Sep 10, 2026, 12:50 AM EDT
Recruiting Not applicable Interventional

Effects of Ketone Ester Consumption on Exercise Tolerance and Cardiac Function

NCT06078683
View directory record Official record
Conditions
Type 2 Diabetes, Ketone Body Metabolism, Ketones, Metabolism
Interventions
Ketone Ester Acute, Placebo Acute
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 80 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Sep 10, 2026, 12:50 AM EDT