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Showing 1–24 of 199 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: GI Symptoms Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Kefir Versus Milk on Time-Trial Performance in Masters Athletes

NCT06165523
View directory record Official record
Conditions
Gastrointestinal Complication, Exercise Performance, Aerobic Endurance
Interventions
Water, Flavored Kefir, Flavored Milk
Other
Lead sponsor
Lindenwood University
Other
Eligibility
40 Years to 75 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 10, 2023 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

A Comparison of SmartPill Capsule With Scintigraphy for Determining Gastric Residence Time - Over 65 Years Old

NCT00682877
View directory record Official record
Conditions
Gastrointestinal Diseases, Stomach Diseases, Gastroparesis
Interventions
Not listed
Lead sponsor
The SmartPill Corporation
Industry
Eligibility
65 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
2
States / cities
Kansas City, Kansas • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 22, 2008 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational

Chronic Marginal Ulcers After Gastric Bypass

NCT01041079
View directory record Official record
Conditions
Marginal Ulcer, Chronic Ulcer Disease, Persistent Ulcer Disease, Recurrent Ulcer Disease, Late Morbidity After Gastric Bypass
Interventions
Not listed
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
1
States / cities
Fresno, California
Source: ClinicalTrials.gov public record
Updated Dec 31, 2009 · Synced Sep 6, 2026, 8:24 AM EDT
Not yet recruiting Not applicable Interventional

Open-Label Clinical Trial Evaluating the Impact of a Multi-Strain Commensal Probiotic Dietary Supplement on Gastrointestinal Microbiota Composition, Functional Gastrointestinal Markers, and Gastrointestinal Symptoms

NCT07720362
View directory record Official record
Conditions
Gastrointestinal, Microbiota
Interventions
Complete Commensal Probiotic
Dietary Supplement
Lead sponsor
OvationLab
Network
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 22, 2026 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational

Clinical Registry of nCLE in Masses and Cystic Tumors of the Pancreas, Lymph Nodes, Submucosal Lesions of the GI Tract

NCT01770405
View directory record Official record
Conditions
Pancreatic Cyst, Pancreatic Neoplasms, Pancreatic Adenoma, Pancreatic Cancer, Pancreatic Islet Cell Tumors, Lymph Node Mass, Lymphadenopathy, GIST
Interventions
Endoscopic ultrasound fine needle aspiration
Device
Lead sponsor
Mauna Kea Technologies
Industry
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
4
States / cities
Atlanta, Georgia • Manhasset, New York • New York, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 28, 2017 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Not applicable Interventional

Development and Validation of the Automated Evaluation of Gastrointestinal Symptoms (AEGIS) Platform

NCT02436057
View directory record Official record
Conditions
Abdominal Pain, Deglutition Disorders, Fecal Incontinence, Nausea, Diarrhea, Constipation, Gastroesophageal Reflux
Interventions
AEGIS (Automated Evaluation of Gastrointestinal Symptoms)
Other
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
255 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
3
States / cities
Los Angeles, California • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 14, 2016 · Synced Sep 6, 2026, 8:24 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

An Efficacy Trial in the Research Area of Gastrointestinal Health & Bloating

NCT05418127
View directory record Official record
Conditions
Gastrointestinal Dysfunction
Interventions
Active, Placebo
Dietary Supplement · Other
Lead sponsor
Coconut Goodness Food Products Inc.
Industry
Eligibility
25 Years to 54 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 18, 2023 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Comparative Study of MCCE With/Without Tether vs Conventional Upper Endoscopy in Patients With Upper Abdominal Symptoms

NCT04605302
View directory record Official record
Conditions
Upper Gastrointestinal Symptoms
Interventions
MCC/MCC-T, Standard gastroscopy
Device
Lead sponsor
AnX Robotica Corp.
Industry
Eligibility
18 Years to 75 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Not applicable Interventional

Comparing Two Types of Diets on Psychological and Gastrointestinal Symptoms

NCT03035799
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
Paleolithic diet, General Healthful Diet
Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated May 6, 2020 · Synced Sep 6, 2026, 8:24 AM EDT
Terminated Phase 2 Interventional Results available

P:II Above-Label Octreotide-LAR With Insufficiently Controlled Carcinoid Syndrome

NCT01886287
View directory record Official record
Conditions
Neuroendocrine Carcinoma
Interventions
Octreotide LAR
Drug
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Jan 11, 2015 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational

Neurohumoral Control of Intestinal Electrical and Mechanical Activity

NCT00852553
View directory record Official record
Conditions
Morbid Obesity
Interventions
Not listed
Lead sponsor
University of California, Davis
Other
Eligibility
Not listed
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2012
U.S. locations
2
States / cities
Sacramento, California • Reno, Nevada
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 4 Interventional Results available

Enteric-coated Mycophenolate Sodium (Myfortic®) in Heart Transplant Recipients

NCT00574197
View directory record Official record
Conditions
Gastrointestinal Symptoms, Heart Transplantation
Interventions
Mycophenolate Sodium
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 29, 2020 · Synced Sep 6, 2026, 8:24 AM EDT
Terminated Not applicable Interventional Results available

Randomized Control Trial Comparing Prokinetics and Their Influence on Endoscopy Outcomes for Upper GI Bleed.

NCT02017379
View directory record Official record
Conditions
Upper Gastrointestinal Bleeding
Interventions
Erythromycin, Metoclopromide
Drug
Lead sponsor
Texas Tech University Health Sciences Center, El Paso
Other
Eligibility
18 Years to 80 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014
U.S. locations
1
States / cities
El Paso, Texas
Source: ClinicalTrials.gov public record
Updated Mar 3, 2021 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Study of Bavituximab and Sorafenib In Patients With Advanced Liver Cancer

NCT01264705
View directory record Official record
Conditions
Hepatocellular Carcinoma, Liver Cancer
Interventions
bavituximab (0.3 mg/kg) and sorafenib, bavituximab (1.0 mg/kg ) and sorafenib, bavituximab (3.0 mg/kg) and sorafenib
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years and older
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Nov 11, 2020 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

An Exploratory Investigation of a Supplement to Promote Gut Health

NCT05831527
View directory record Official record
Conditions
Gastrointestinal Symptoms, Exercise Performance
Interventions
ARMRA™ Bovine Colostrum
Drug
Lead sponsor
Armra
Industry
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Santa Monica, California
Source: ClinicalTrials.gov public record
Updated Apr 25, 2023 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Microalgae Extract Dietary Supplement on Gut Health, Anxiety, and Immune Function

NCT06425094
View directory record Official record
Conditions
Gastrointestinal Problem, Anxiety, Stress, Gastrointestinal Symptoms
Interventions
Microalgae Extract Capsules, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 55 Years
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 2Phase 3 Interventional

Efficacy, Safety, and Tolerability Study of RP-G28 in Subjects With Lactose Intolerance

NCT02673749
View directory record Official record
Conditions
Lactose Intolerance
Interventions
RP-G28, Placebo
Drug · Other
Lead sponsor
Ritter Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 75 Years
Enrollment
377 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 3, 2018 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational

Gastrointestinal Dysfunction in Children Affected With Mitochondrial Disorders

NCT01137240
View directory record Official record
Conditions
Gastrointestinal Dysfunction, Mitochondrial Disorders
Interventions
gastric emptying scan
Procedure
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
3 Years to 18 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Feb 26, 2012 · Synced Sep 6, 2026, 8:24 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Personalized GI Motility Responses to Diet

NCT06386471
View directory record Official record
Conditions
Nutritional and Metabolic Diseases, Gastrointestinal Dysfunction, Cardiovascular Diseases, Dysbiosis
Interventions
Whole grain rye bread, Refined grain rye bread
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
21 Years to 63 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Sep 6, 2026, 8:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Confocal Probe-based Endoscopic Imaging, Colorectal Cancer, Gastrointestinal (GI) Pathologies

NCT00874263
View directory record Official record
Conditions
Colonic Polyps, Esophageal Diseases
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2012
U.S. locations
1
States / cities
Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 21, 2012 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 3 Interventional

Esomeprazole for Prevention of Upper Gastrointestinal Symptoms Associated With Continuous Use of NSAIDs

NCT00241514
View directory record Official record
Conditions
GERD
Interventions
Esomeprazole
Drug
Lead sponsor
AstraZeneca
Industry
Eligibility
18 Years and older
Enrollment
334 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
19
States / cities
Tucson, Arizona • Anaheim, California • Orange, California + 16 more
Source: ClinicalTrials.gov public record
Updated Jan 20, 2011 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 2 Interventional

Evaluating an Amino Acid Based Medical Food w/ Diarrhea in Carcinoid Syndrome & Other NETs

NCT03722511
View directory record Official record
Conditions
Neuroendocrine Tumors, Carcinoid Tumor of GI System, Diarrhea, Carcinoid Syndrome
Interventions
Amino Acid Based Medical Food/Drink
Dietary Supplement
Lead sponsor
Lowell Anthony, MD
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Nov 2, 2022 · Synced Sep 6, 2026, 8:24 AM EDT
Terminated Not applicable Interventional

Early Colonoscopy for Lower Gastrointestinal (GI) Bleeding

NCT01031342
View directory record Official record
Conditions
Gastrointestinal Hemorrhage
Interventions
Early colonoscopy, Elective colonoscopy
Procedure
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jan 24, 2011 · Synced Sep 6, 2026, 8:24 AM EDT
Completed Phase 1 Interventional

Pilot Study of Sorafenib and Bi-weekly Capecitabine in Patients With Advanced Breast and Gastrointestinal Tumors

NCT01640665
View directory record Official record
Conditions
Metastatic Breast Cancer, Gastrointestinal Tumors
Interventions
Sorafenib, Capecitabine
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Sep 15, 2016 · Synced Sep 6, 2026, 8:24 AM EDT