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ClinicalTrials.gov public records Last synced Oct 24, 2026, 8:10 AM EDT

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Showing 673–696 of 913 matching trials from the live ClinicalTrials.gov search.
Recruiting No phase listed Observational Accepts healthy volunteers

Capsule Microbiota Sampling in IBS/Functional Gastrointestinal Disease

NCT06215222
Conditions
IBS - Irritable Bowel Syndrome, Healthy, Functional Bloating, Functional Gastrointestinal Disorders
Interventions
Microbiota Sampling
Other
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Redwood City, California
Completed Phase 4 Interventional

Fecal Microbiota Transplant

NCT04090346
Conditions
Clostridium Difficile Infection
Interventions
Fecal Microbiota Transplant
Drug
Lead sponsor
Methodist Health System
Other
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Dallas, Texas
Conditions
Non Small Cell Lung Cancer
Interventions
Healthy Donor Fecal Microbiota Transplant (hdFMT), Pembrolizumab
Drug
Lead sponsor
Diwakar Davar
Other
Eligibility
18 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2036
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Conditions
Pitt Hopkins Syndrome
Interventions
vancomycin, magnesium citrate, microbiota, placebo vancomycin, real magnesium citrate, placebo microbiota
Combination Product
Lead sponsor
Arizona State University
Other
Eligibility
7 Years to 17 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Tempe, Arizona
Conditions
Obesity, Non-Alcoholic Fatty Liver Disease
Interventions
Blood Draw, Stool collection, BodPod Measurement, Liver Ultrasound
Other
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
5 Years to 18 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Conditions
Carcinoma, Renal Cell, Carcinoma, Urothelial
Interventions
Immune cell and CTC detection procedures
Device
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2028
U.S. locations
1
States / cities
Durham, North Carolina
Recruiting No phase listed Observational Accepts healthy volunteers

Exogenous and Endogenous Risk Factors for Early-onset Colorectal Cancer

NCT05732623
Conditions
Colorectal Cancer, Early Onset Colorectal Cancer, Diet Habit, Risk Reduction
Interventions
Semi Quantitative Food Frequency Questionnaire (SQFFQ)
Behavioral
Lead sponsor
San Raffaele University
Other
Eligibility
18 Years to 49 Years
Enrollment
2,300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2035
U.S. locations
2
States / cities
Denver, Colorado • Chicago, Illinois
Completed Not applicable Interventional Accepts healthy volunteers

Addition to Infant Formula of 2-fucosyllactose (2-FL)

NCT03109223
Conditions
Growth of Infants
Interventions
sole source nutrition
Other
Lead sponsor
PBM Nutritionals
Industry
Eligibility
4 Days to 36 Days
Enrollment
221 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2021
U.S. locations
5
States / cities
Birmingham, Alabama • Evansville, Indiana • The Bronx, New York + 2 more
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Investigating the Genetic and Phenotypic Presentation of Ataxia and Nucleotide Repeat Diseases

NCT04529252
Conditions
Spinocerebellar Ataxias, Cerebellar Ataxia, Nucleotide Repeat Disease
Interventions
Specimen collection
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2026
U.S. locations
1
States / cities
Jacksonville, Florida
Completed No phase listed Observational Accepts healthy volunteers

Energy Metabolism and Nutrient Absorption in Lean and Obese Individuals

NCT00414063
Conditions
Obesity
Interventions
Not listed
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 45 Years · Male only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2013
U.S. locations
1
States / cities
Phoenix, Arizona
Conditions
Breast Cancer
Interventions
Fecal swab collection, Blood samples
Biological
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Time-restricted Eating on Nutrient Absorption in Healthy Adults

NCT04877262
Conditions
Digestibility
Interventions
weight maintenance diet (WMD)
Other
Lead sponsor
Florida State University
Other
Eligibility
20 Years to 45 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Tallahassee, Florida
Conditions
Lower Urinary Tract Symptoms, Gynecologic Malignancy
Interventions
Not listed
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006
U.S. locations
1
States / cities
Orange, California
Completed Not applicable Interventional Accepts healthy volunteers

Stress & Resilience Study

NCT06063174
Conditions
Stress, Stress, Psychological, Stress, Physiological, Stress, Emotional, Stress Reaction
Interventions
Education Program, Think Well Program, Be Well Program, Eat Well Program, Sleep Well Program, Move Well Program
Behavioral
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years and older
Enrollment
712 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Los Angeles, California
Completed Not applicable Interventional Accepts healthy volunteers

Infant Fecal Insult Study

NCT02979210
Conditions
Dermatitis
Interventions
Artificial Fecal Insult, Phosphate Buffered Saline
Other
Lead sponsor
Kimberly-Clark Corporation
Industry
Eligibility
18 Years to 40 Years · Female only
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Irving, Texas
Conditions
Clinical Stage III Cutaneous Melanoma AJCC v8, Clinical Stage IV Cutaneous Melanoma AJCC v8, Locally Advanced Lung Carcinoma, Locally Advanced Malignant Solid Neoplasm, Locally Advanced Melanoma, Metastatic Lung Carcinoma, Metastatic Malignant Solid Neoplasm, Metastatic Melanoma, Stage III Lung Cancer AJCC v8, Stage IV Lung Cancer AJCC v8
Interventions
Biospecimen Collection, Electronic Health Record Review
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Withdrawn Not applicable Interventional Accepts healthy volunteers

The Effect of Oral Alpha-Cyclodextrin on Fecal Fat Excretion

NCT01910558
Conditions
Obesity, Cardiovascular Disease
Interventions
Alpha-cyclodextrin and digestible starch, Alpha-cyclodextrin, Digestible starch
Dietary Supplement
Lead sponsor
Pennington Biomedical Research Center
Other
Eligibility
18 Years to 60 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Baton Rouge, Louisiana
Completed Phase 1 Interventional Accepts healthy volunteers

The Impact of Proton Pump Inhibitors on the Fecal Microbiome

NCT01822977
Conditions
Healthy, Clostridium Difficile Infection
Interventions
omeprazole
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Scottsdale, Arizona
Completed Not applicable Interventional

Biofeedback for Fecal Incontinence

NCT00124904
Conditions
Fecal Incontinence
Interventions
Biofeedback, Kegel exercises
Behavioral
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
16 Years and older
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2006
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Completed No phase listed Observational Accepts healthy volunteers

Fecal Microbiota Transplantation (FMT) in Multiple Sclerosis

NCT03975413
Conditions
Multiple Sclerosis, Relapsing-Remitting
Interventions
Fecal Microbiota Transplantation (FMT)
Other
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Not listed Not applicable Interventional Accepts healthy volunteers

Plants Optimizing Development Study (PODS)

NCT06276426
Conditions
Healthy Children
Interventions
Soy foods, Non-Soy Plant-Based Foods
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
8 Years to 11 Years
Enrollment
96 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2026
U.S. locations
1
States / cities
Urbana, Illinois
Conditions
Gastrointestinal Disease, Colorectal Cancer
Interventions
Pure-Vu System
Device
Lead sponsor
Motus GI Medical Technologies Ltd
Industry
Eligibility
22 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Conditions
Colorectal Neoplasms, Digestive System Diseases, Colonic Diseases, Colorectal Cancer
Interventions
Not listed
Lead sponsor
Exact Sciences Corporation
Industry
Eligibility
40 Years to 90 Years
Enrollment
435 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
20
States / cities
Birmingham, Alabama • Huntsville, Alabama • Atlanta, Georgia + 14 more
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Night Owl Sleep Study: The Effect of Sleep on Fecal Microbiota

NCT07243574
Conditions
Sleep
Interventions
Increase sleep by 90 minutes, Decrease sleep by 90 minutes
Behavioral
Lead sponsor
Danisco
Industry
Eligibility
20 Years to 40 Years
Enrollment
174 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
3
States / cities
Miami, Florida • Boston, Massachusetts • Garden City, New York