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ClinicalTrials.gov public records Last synced Oct 25, 2026, 1:48 PM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 1–24 of 116 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Fiber supplement Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

An Open-Label, Two-Arm Pilot Study of the Tolerability, Consumer Acceptability, and Exploratory Well-Being Outcomes of a Multi-Ingredient Protein Formula in Two Flavors in Healthy Adults

NCT07827014
View directory record Official record
Conditions
Healthy
Interventions
Vanilla Protein Formula, Chocolate Protein Formula
Dietary Supplement
Lead sponsor
Qualia Life Sciences
Industry
Eligibility
21 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Carlsbad, California
Source: ClinicalTrials.gov public record
Updated Sep 18, 2026 · Synced Oct 25, 2026, 1:48 PM EDT
Recruiting Not applicable Interventional

Effects of Ketosis on Brain Function in Patients With T1DM

NCT04219709
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
24 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 18, 2024 · Synced Oct 25, 2026, 1:48 PM 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 10, 2025 · Synced Oct 25, 2026, 1:48 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 25, 2026, 1:48 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 25, 2026, 1:48 PM 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 28, 2022 · Synced Oct 25, 2026, 1:48 PM 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 8, 2023 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of a Fiber Supplement on Gut Health

NCT07755735
View directory record Official record
Conditions
Gut Health, Bloating, Irregular Bowel Movements, Gastrointestinal Symptoms
Interventions
Active Supplement, Placebo Comparator
Dietary Supplement
Lead sponsor
Belli Welli Inc.
Industry
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 10, 2026 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional

Effects of Resistant Starch Diet on the Gut Microbiome in Chronic Kidney Disease

NCT03356990
View directory record Official record
Conditions
Chronic Kidney Diseases
Interventions
Resistant Starch
Dietary Supplement
Lead sponsor
University of Arkansas
Other
Eligibility
5 Years to 85 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Mar 7, 2025 · Synced Oct 25, 2026, 1:48 PM EDT
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 25, 2026, 1:48 PM EDT
No Longer Available No phase listed Expanded access

Starch-entrapped Microspheres [Nutrabiotix Fiber] for Gut Health

NCT01210625
View directory record Official record
Conditions
Constipation
Interventions
Nutrabiotix, Psyllium
Dietary Supplement
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 8, 2023 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

GLOW Study: Effects of Triple Protein in Women

NCT07526571
View directory record Official record
Conditions
Healthy Women
Interventions
Triple protein support, Placebo
Dietary Supplement
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
30 Years to 60 Years · Female only
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 25, 2026, 1:48 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 25, 2026, 1:48 PM EDT
Recruiting Not applicable Interventional

Very Low Carbohydrate Diets and Glucagon Response in T1DM

NCT04200391
View directory record Official record
Conditions
Type1diabetes
Interventions
Very low carbohydrate diet
Other
Lead sponsor
Boston Children's Hospital
Other
Eligibility
18 Years to 40 Years
Enrollment
12 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 18, 2024 · Synced Oct 25, 2026, 1:48 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 25, 2026, 1:48 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 25, 2026, 1:48 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Effects of Carbohydrate in Diet and Supplements on the Gastrointestinal Tolerability of LIK066

NCT03198767
View directory record Official record
Conditions
Obesity
Interventions
LIK066, Carbohydrate 50%, Carbohydrate 25%, Carbohydrate 8%, Carbohydrate 0%, Psyllium, Calcium carbonate
Drug · Dietary Supplement
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
54 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Oct 25, 2026, 1:48 PM 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 16, 2020 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nutritive Effects of Prebiotics on Early Postnatal Behavioral Measures of Tolerance

NCT02118935
View directory record Official record
Conditions
Behavioral Measures of Tolerance
Interventions
Previously marketed cow's mlik-based infant formula, Marketed cow's milk-based infant formula with prebiotics
Other
Lead sponsor
Mead Johnson Nutrition
Industry
Eligibility
14 Days to 35 Days
Enrollment
161 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
7
States / cities
Fayetteville, Arkansas • Norwich, Connecticut • Evansville, Indiana + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2016 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of a Prebiotic and Probiotic Supplement to Provide Relief From Symptoms Associated With Bacterial Vaginosis and Yeast Infections.

NCT06665126
View directory record Official record
Conditions
Bacterial Vaginosis, Yeast Infection
Interventions
Prebiotic + Probiotic Supplement, Active Placebo Supplement, Excipient Placebo Supplement
Dietary Supplement
Lead sponsor
Happy V
Industry
Eligibility
25 Years and older · Female only
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional

Prebiotic in Preterm Infants

NCT03306316
View directory record Official record
Conditions
Preterm Infant, Development, Infant, Nutrition
Interventions
Prebiotic, Dextrose Control
Dietary Supplement
Lead sponsor
Nationwide Children's Hospital
Other
Eligibility
7 Days to 10 Days
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 8, 2024 · Synced Oct 25, 2026, 1:48 PM 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 17, 2017 · Synced Oct 25, 2026, 1:48 PM EDT
Active, not recruiting Phase 1 Interventional

Microbiota Transplant With Antibiotic Preconditioning and Fiber Supplementation in PAH.

NCT07751120
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
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 25, 2026, 1:48 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluate the Effects of Repeated Periods of Modified Fasting to Support Healthy Natural Weight Management and Prevention of Weight Gain

NCT03372109
View directory record Official record
Conditions
Body Weight Changes
Interventions
Meal replacement shake, Multivitamin and mineral capsules, Fish oil with sesame lignans and olive extract softgel, Prebiotic Chewable tablet, Clove Extract and Maqui Berry extract capsule, .Whole Food Blend capsule, Turmeric extract capsule, European White Kidney Bean capsule, Saffron extract capsule, Ubiquinol with Fulvic acid complex softgel, Calcium with Hesperidin and gynostemma extract tablet, Multivitamin and mineral supplement
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
21 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Apr 17, 2018 · Synced Oct 25, 2026, 1:48 PM EDT