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Showing 1–24 of 612 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: GI Tract Disorders Clear all
Active, not recruiting Not applicable Interventional Results available

Early Protein Supplementation in Extremely Preterm Infants Fed Human Milk

NCT04325308
View directory record Official record
Conditions
Prematurity; Extreme, Feeding Disorder Neonatal, Breast Milk Expression, Growth Failure, Microbial Colonization
Interventions
Protein-enriched human milk diet, Usual human milk diet
Procedure
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Day to 4 Days
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Not listed Phase 1Phase 2 Interventional

A Study of the Efficacy of Cannabidiol in Patients With Multiple Myeloma, Glioblastoma Multiforme, and GI Malignancies

NCT03607643
View directory record Official record
Conditions
Cancer of Pancreas, Cancer of Liver, Cancer of Rectum, Cancer of Colon, Cancer, Gall Bladder, Myeloma Multiple, Glioblastoma Multiforme
Interventions
Cannabidiol, Bortezomib, Leucovorin, 5-FU, Oxaliplatin, Bevacizumab, Irinotecan, Gemcitabine, Temozolomide
Drug
Lead sponsor
Leaf Vertical Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
160 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jul 30, 2018 · Synced Sep 2, 2026, 4:10 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Vitamin D Intervention and Associated Changes in the Gut Microbiome and Vitamin D Levels in Healthy Adults

NCT05387876
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Vitamin D intervention, Placebo intervention
Dietary Supplement
Lead sponsor
Baylor University
Other
Eligibility
18 Years to 79 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Waco, Texas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 2, 2026, 4:10 PM EDT
Recruiting Phase 2 Interventional

Microbiome and Association With Implant Infections

NCT05020574
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Genetic Predisposition to Disease
Interventions
Cephalexin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Not listed Phase 3 Interventional

Comparing Side Effects of Two Forms of Videx in HIV-Infected Adults

NCT00008489
View directory record Official record
Conditions
HIV Infections
Interventions
Didanosine
Drug
Lead sponsor
PharmaResearch
Industry
Eligibility
16 Years and older
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
15
States / cities
Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 11 more
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Sep 2, 2026, 4:10 PM EDT
Completed No phase listed Observational

Environmental Health Effects on Your Physiology

NCT03986814
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years to 25 Years
Enrollment
92 participants
Timeline
2019 – 2022
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Dec 8, 2024 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Effect of Camicinal on Gastroparesis Symptoms in Type 1 and 2 Diabetic Subjects With Gastroparesis

NCT02210000
View directory record Official record
Conditions
Gastroparesis
Interventions
Placebo, Camicinal
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 80 Years
Enrollment
114 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
34
States / cities
Chandler, Arizona • Long Beach, California • Northridge, California + 29 more
Source: ClinicalTrials.gov public record
Updated Dec 10, 2017 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Dietary Fructose on Gut Microbiota and Fecal Metabolites in Obese Men and Postmenopausal Women: A Pilot Study

NCT03339245
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease, Obesity
Interventions
Fructose Solution (75 Grams), Glucose Solution (75 grams)
Other
Lead sponsor
Rockefeller University
Other
Eligibility
45 Years to 70 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 25, 2021 · Synced Sep 2, 2026, 4:10 PM EDT
Active, not recruiting Not applicable Interventional

Real World Treatment Experience of Patients With Breast, Lung, or GI Cancer or Multiple Myeloma Using Remote Symptom Monitoring

NCT05587972
View directory record Official record
Conditions
Breast Cancer, Lung Cancer, Gastrointestinal Cancer, Multiple Myeloma
Interventions
survey
Other
Lead sponsor
Carevive Systems, Inc.
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 22, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Traumatic Brain Injury and the Gut Microbiome

NCT04949607
View directory record Official record
Conditions
Brain Injury, Chronic, Brain Injuries, Traumatic
Interventions
Inulin fructooligosaccharide
Dietary Supplement
Lead sponsor
Centre for Neuro Skills
Industry
Eligibility
18 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Bakersfield, California
Source: ClinicalTrials.gov public record
Updated Jul 19, 2022 · Synced Sep 2, 2026, 4:10 PM EDT
Not listed No phase listed Observational

Composition and Collection Feasibility of Gut Microbiota in Children With and Without Obesity

NCT03149601
View directory record Official record
Conditions
Childhood Obesity
Interventions
Not listed
Lead sponsor
University of Illinois College of Medicine at Peoria
Other
Eligibility
5 Years to 12 Years
Enrollment
150 participants
Timeline
2017 – 2019
U.S. locations
1
States / cities
Peoria, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 31, 2019 · Synced Sep 2, 2026, 4:10 PM EDT
Not yet recruiting Not applicable Interventional

Isocaloric Navy-Bean Substitution in Adults With MASLD

NCT07730853
View directory record Official record
Conditions
Metabolic Dysfunction-Associated Steatotic Liver Disease (MASLD), Liver Fibrosis, Metabolic Dysfunction-Associated Steatohepatitis (MASH)
Interventions
Dietary Supplement/Behavioral: Navy Bean-Rich Diet, Habitual Diet (Control)
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Effects of a Butyrate-Polyphenol Formulation on Gut Health and Associated Symptoms

NCT07371975
View directory record Official record
Conditions
Gut Health
Interventions
Butyrate + Polyphenol Formulation, Placebo
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
25 Years to 70 Years
Enrollment
124 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Feeding Regulation in SCI

NCT05406739
View directory record Official record
Conditions
Spinal Cord Injuries
Interventions
Test Meals
Other
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Feb 13, 2024 · Synced Sep 2, 2026, 4:10 PM EDT
Withdrawn Phase 3 Interventional

A Phase III Study to Evaluate the Efficacy, Safety, and Pharmacokinetics of Investigational Product MP-101 in Subjects With Short Bowel Syndrome Who Have Had an Inadequate Response to Anti-Diarrheals

NCT02242656
View directory record Official record
Conditions
Short Bowel Syndrome, Short Gut Syndrome, SBS, Short Bowel, Short Gut
Interventions
Opium Tincture USP Deodorized
Drug
Lead sponsor
Marathon Pharmaceuticals, LLC
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2014
U.S. locations
5
States / cities
Chicago, Illinois • Indianapolis, Indiana • Cleveland, Ohio + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2015 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Hormonal Regulation of Postpartum Weight and Presence of Gut Peptides in Human Milk

NCT01514539
View directory record Official record
Conditions
Maternal Obesity Syndrome
Interventions
cross-sectional
Other
Lead sponsor
University of Wyoming
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2014
U.S. locations
1
States / cities
Laramie, Wyoming
Source: ClinicalTrials.gov public record
Updated Jan 8, 2015 · Synced Sep 2, 2026, 4:10 PM EDT
Active, not recruiting Not applicable Interventional

Gut Microbe Composition, Exercise, and Breast Breast Cancer Survivors

NCT04088708
View directory record Official record
Conditions
Breast Cancer, Gut Microbiome, Exercise, Fatigue
Interventions
Aerobic Exercise Training, Attention Control
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 74 Years · Female only
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 15, 2025 · Synced Sep 2, 2026, 4:10 PM EDT
Recruiting Not applicable Interventional

Dietary Wild Blueberries and Joint Health

NCT06828159
View directory record Official record
Conditions
Gut -Microbiota, Inflammation Biomarkers, Pain Assessment, Joint Pain
Interventions
Wild blueberry, Placebo
Dietary Supplement
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
40 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Oklahoma City, Oklahoma
Source: ClinicalTrials.gov public record
Updated Nov 4, 2025 · Synced Sep 2, 2026, 4:10 PM EDT
Completed No phase listed Observational

Assessment of Symptom-Related Cytokines in Lung and Gastrointestinal (GI) Cancer Patients

NCT00502502
View directory record Official record
Conditions
Anal Cancer, Colorectal Cancer, Esophageal Cancer, Gastric Cancer, Lung Cancer
Interventions
Questionnaire
Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
205 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2010
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 19, 2012 · Synced Sep 2, 2026, 4:10 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Pulses Consumption and Its Role in Managing Systemic Inflammation, Insulin Sensitivity and Gut Microbiome in Human

NCT04267705
View directory record Official record
Conditions
Insulin Sensitivity, Overweight or Obesity, Inflammatory Response
Interventions
Control, Black bean, Chickpea
Other
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional

Influences of High-fiber, Organic Whole-food Formula on the Gut Microbiome in Critically Ill Children

NCT03414775
View directory record Official record
Conditions
Critical Illness, Dysbiosis, Pediatric ALL
Interventions
Nourish, Pediasure
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
1 Year to 17 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 11, 2026 · Synced Sep 2, 2026, 4:10 PM EDT
Completed No phase listed Observational Results available

Comparison of Virologic and Immunologic Responses to Raltegravir and Dolutegravir in the Gastrointestinal Tract of HIV-Positive Adults

NCT02218320
View directory record Official record
Conditions
Human Immunodeficiency Virus
Interventions
Raltegravir, Dolutegravir, Colonoscopy with biopsy
Drug · Procedure
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 25, 2018 · Synced Sep 2, 2026, 4:10 PM EDT
Completed Not applicable Interventional

A Clinical Study to Assess the Physiologic Effects of KB109 in Patients With COVID-19 on Gut Microbiota Structure and Function

NCT04486482
View directory record Official record
Conditions
Mild-to-Moderate COVID-19
Interventions
KB109 + Self Supportive Care (SSC), Self Supportive Care (SSC) Alone
Other
Lead sponsor
Kaleido Biosciences
Industry
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
12
States / cities
Cullman, Alabama • Los Angeles, California • Rancho Cucamonga, California + 7 more
Source: ClinicalTrials.gov public record
Updated Aug 12, 2021 · Synced Sep 2, 2026, 4:10 PM EDT
Active, not recruiting Early Phase 1 Interventional

The Gut, Liver And Metabolome in Human Immunodeficiency Virus and Non Alcoholic Fatty Liver Disease

NCT06113003
View directory record Official record
Conditions
HIV, Non-Alcoholic Fatty Liver Disease, Metabolic-Associated Steatotic Liver Disease
Interventions
Prebiotic, Probiotic
Dietary Supplement
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 89 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Sep 2, 2026, 4:10 PM EDT