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ClinicalTrials.gov public records Last synced Oct 6, 2026, 2:37 PM EDT

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Showing 73–96 of 114 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Dietary Fiber Supplement Clear all
Recruiting Phase 1 Interventional

A Pilot Study of Microbiota Transplant With Antibiotic Preconditioning and Fiber Supplementation in Pulmonary Arterial Hypertension (GUT RESTORE-PAH)

NCT06481852
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
MTT with antibiotic preconditioning + fiber supplementation, MTT with antibiotic preconditioning + placebo supplementation, MTT with placebo + placebo supplementation.
Drug · Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 31, 2026 · Synced Oct 6, 2026, 2:37 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

High Fiber in Parkinson's Disease

NCT04976959
View directory record Official record
Conditions
Parkinson Disease
Interventions
High Fiber supplement
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
50 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
New Brunswick, New Jersey
Source: ClinicalTrials.gov public record
Updated Feb 26, 2024 · Synced Oct 6, 2026, 2:37 PM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

L. Acidophilus (Strain TW01) on Gut Health, Body Composition, and Inflammation

NCT06912100
View directory record Official record
Conditions
Overweight (BMI > 25), Obese, Otherwise Healthy Volunteers
Interventions
Placebo, Probiotic
Dietary Supplement
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 60 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Soy, Bone and Health in College Females

NCT00244478
View directory record Official record
Conditions
Osteoporosis, Obesity
Interventions
Soy Protein Dietary Supplement, Placebo
Dietary Supplement
Lead sponsor
University of Georgia
Other
Eligibility
18 Years to 19 Years · Female only
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Athens, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 25, 2015 · Synced Oct 6, 2026, 2:37 PM EDT
Recruiting Not applicable Interventional

Oral Nutritional Optimization in Total Joint Arthroplasty

NCT04210284
View directory record Official record
Conditions
Osteoarthritis
Interventions
Ensure
Dietary Supplement
Lead sponsor
NYU Langone Health
Other
Eligibility
55 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
2
States / cities
New York, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Oct 6, 2026, 2:37 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Chicory Fiber Effect on Satiety and GI Tolerance

NCT04067362
View directory record Official record
Conditions
Diet, Healthy
Interventions
food containing dietary fiber
Other
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Saint Paul, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 8, 2020 · Synced Oct 6, 2026, 2:37 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Multiomic Signatures of Microbial Metabolites Following Prebiotic Fiber Supplementation

NCT03925597
View directory record Official record
Conditions
Prebiotics
Interventions
Fiber cycles ARM 1, Fiber cycles ARM 2, Fiber cycles ARM 3, Fiber cycles ARM 4, Fiber cycles ARM 5, Fiber cycles ARM 6, Fiber cycles ARM 7, Fiber cycles ARM 8, Fiber cycles ARM 9, Fiber cycles ARM 10, Fiber cycles ARM 11, Fiber cycles ARM 12, Fiber cycles ARM 13, Fiber cycles ARM 14, Fiber cycles ARM 15, Fiber cycles ARM 16, Fiber cycles ARM 17, Fiber cycles ARM 18, Fiber cycles ARM 19, Fiber cycles ARM 20, Fiber cycles ARM 21, Fiber cycles ARM 22, Fiber cycles ARM 23, Fiber cycles ARM 24
Dietary Supplement
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 99 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2025
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 26, 2025 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of an Intermittent Fasting and Dietary Supplement Regimen on Glycemic Variability

NCT05493553
View directory record Official record
Conditions
Healthy, Impaired Glucose Tolerance
Interventions
Dietary supplement regimen, Dietary supplement and intermittent fasting regimen
Dietary Supplement · Other
Lead sponsor
Unicity International, Inc.
Industry
Eligibility
30 Years to 69 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 1, 2022 · Synced Oct 6, 2026, 2:37 PM EDT
Active, not recruiting Not applicable Interventional

Addressing Diabetes by Elevating Access to Nutrition

NCT05228860
View directory record Official record
Conditions
Diabetes, Obesity, Lifestyle, Healthy
Interventions
Vida Sana (a Group Lifestyle Intervention), Supplemental Healthy Food Deliveries
Behavioral
Lead sponsor
Stanford University
Other
Eligibility
18 Years and older
Enrollment
233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Concord, California
Source: ClinicalTrials.gov public record
Updated Sep 14, 2026 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Satiety and Alcohol Challenge

NCT06576674
View directory record Official record
Conditions
Alcohol Drinking
Interventions
Dietary Fiber + Green Tea Extract, Alcohol, Aspartame Placebo Supplement
Dietary Supplement · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
21 Years to 45 Years
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 5, 2025 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional

The Effects of a High Protein Diet on Microbiota, Gastrointestinal Function and Wellness in Older Women

NCT02445560
View directory record Official record
Conditions
Aging
Interventions
Probiotic capsule and Fiber Sachet, Probiotic capsule and Placebo sachet, Placebo capsule and Fiber Sachet, Placebo capsule and Placebo sachet
Dietary Supplement
Lead sponsor
University of Florida
Other
Eligibility
65 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
2
States / cities
Gainesville, Florida • Ocala, Florida
Source: ClinicalTrials.gov public record
Updated Mar 29, 2018 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluate Effects of Sprinkled Format REDUCOSE in a Carbohydrate-rich, Mixed Meal on Post-prandial Glycemia

NCT04877366
View directory record Official record
Conditions
Dietary Supplement
Interventions
Dietary Supplement: Sprinkled Format REDUCOSE., Reference control, Active comparator
Dietary Supplement · Other
Lead sponsor
Société des Produits Nestlé (SPN)
Industry
Eligibility
19 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Tustin, California
Source: ClinicalTrials.gov public record
Updated Oct 15, 2024 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional

Pilot Trial of a Synbiotic in HIV+ Patients

NCT00688311
View directory record Official record
Conditions
HIV Infection
Interventions
Synbiotic 2000, Placebo
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Female only
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 23, 2009 · Synced Oct 6, 2026, 2:37 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Ovolux Beauty From Within Trial#2

NCT07188051
View directory record Official record
Conditions
Skin Sagging, Skin Wrinkling, Skin Dryness
Interventions
Ovolux brand eggshell membrane powder, Placebo
Dietary Supplement
Lead sponsor
ESM Technologies, LLC
Industry
Eligibility
35 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 18, 2025 · Synced Oct 6, 2026, 2:37 PM 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 5, 2022 · Synced Oct 6, 2026, 2:37 PM 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 3, 2026 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of a Dietary Supplement in Lowering SAH in Healthy Adults With Elevated Plasma SAH and Normal Homocysteine Levels

NCT05994794
View directory record Official record
Conditions
Elevated S-adenosylhomocysteine
Interventions
Alpha-GPC, Creatine and Ashwagandha (Sensoril®), Placebo
Dietary Supplement · Other
Lead sponsor
Standard Process Inc.
Industry
Eligibility
30 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
South Gate, California
Source: ClinicalTrials.gov public record
Updated Mar 7, 2024 · Synced Oct 6, 2026, 2:37 PM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

PsylliumRx Dietary Fiber Study

NCT03629119
View directory record Official record
Conditions
Obesity, Childhood Obesity
Interventions
Dietary Fiber Supplement
Dietary Supplement
Lead sponsor
Kaiser Permanente
Other
Eligibility
12 Years to 21 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Pasadena, California
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Behavior of Infants Fed Formula Supplemented With Prebiotics

NCT02757924
View directory record Official record
Conditions
Gastrointestinal Tolerance
Interventions
Infant formula supplemented with prebiotics
Other
Lead sponsor
Abbott Nutrition
Industry
Eligibility
7 Days to 42 Days
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
11
States / cities
Dothan, Alabama • Pensacola, Florida • St. Petersburg, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 19, 2017 · Synced Oct 6, 2026, 2:37 PM 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 4, 2025 · Synced Oct 6, 2026, 2:37 PM 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 26, 2026 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Improving the Iron Status of Athletes With Pre-, Pro- and Synbiotics

NCT06021171
View directory record Official record
Conditions
Iron-deficiency, Iron Deficiency Anemia, Iron Deficiency (Without Anemia)
Interventions
Partially hydrolyzed guar gum + bifidobacterium lactis, Partially hydrolyzed guar gum, Maltodextrin
Dietary Supplement
Lead sponsor
King's College
Other
Eligibility
18 Years to 35 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Wilkes-Barre, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 1, 2023 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dietary Intervention for Visceral Adiposity

NCT01350518
View directory record Official record
Conditions
Obesity
Interventions
Benefiber, TrueLemon
Dietary Supplement
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
20 Years to 50 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2014
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 28, 2018 · Synced Oct 6, 2026, 2:37 PM EDT
Completed Not applicable Interventional Results available

Effect of Milk Oligosaccharides and Bifidobacteria on the Intestinal Microflora of Children With Autism

NCT02086110
View directory record Official record
Conditions
Autism
Interventions
Synbiotic, Prebiotic
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
2 Years to 11 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Aug 1, 2019 · Synced Oct 6, 2026, 2:37 PM EDT