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ClinicalTrials.gov public records Last synced Oct 20, 2026, 3:13 AM EDT

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Showing 1–24 of 661 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Gut Microbiomes Clear all
Completed Phase 1 Interventional Results available

Effect of Prebiotics on the Gut Microbiome Profile and Beta Cell Function

NCT04114357
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Acetylated and Butyrylated High Amylose Maize Starch
Drug
Lead sponsor
Indiana University
Other
Eligibility
11 Years to 17 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Oct 1, 2024 · Synced Oct 20, 2026, 3:13 AM EDT
Active, not recruiting Not applicable Interventional

A Culturally Tailored Dietary Intervention to Treat Crohn's Disease

NCT05627128
View directory record Official record
Conditions
Crohn Disease
Interventions
DAIN
Other
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
21 Years to 65 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 17, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

Acetate and Age-associated Arterial Dysfunction

NCT05424263
View directory record Official record
Conditions
Aging, Vascular Stiffness, Vascular Dilation
Interventions
Calcium Acetate Oral Solution, Calcium Carbonate Oral Suspension
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
50 Years and older
Enrollment
37 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 31, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Recruiting No phase listed Observational

Study to Detect Changes in Urinary and Gut Microbiome During Androgen Deprivation Therapy and Radiation Therapy in Patients With Prostate Cancer

NCT04775355
View directory record Official record
Conditions
Stage I Prostate Cancer AJCC v7, Stage II Prostate Cancer AJCC v7, Stage IIA Prostate Cancer AJCC v7, Stage IIB Prostate Cancer AJCC v7, Stage III Prostate Cancer AJCC v7, Stage IV Prostate Cancer AJCC v7
Interventions
Biospecimen Collection, Electronic Health Record Review, Quality-of-Life Assessment, Questionnaire Administration
Procedure · Other
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older · Male only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Duarte, California
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Phase 2 Interventional Results available

The Effect of an Antibiotic on the Production of Uremic Toxins by the Gut Microbiome

NCT03452189
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
Vancomycin, Placebo
Drug · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 26, 2021 · Synced Oct 20, 2026, 3:13 AM EDT
Active, not recruiting Not applicable Interventional

The Beans to Enrich the Gut Microbiome vs. Obesity's Negative Effects (BE GONE) Trial

NCT02843425
View directory record Official record
Conditions
Colorectal Cancer Prevention
Interventions
Regular Diet, Navy Beans (Canned)
Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
30 Years and older
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2027
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 6, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Completed No phase listed Observational

Oral Aromatase Inhibitors Modify the Gut Microbiome

NCT05030038
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jun 15, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Roles of Gut Microbiome in UTI Susceptible Women

NCT05065008
View directory record Official record
Conditions
Healthy
Interventions
Cranberry juice, Apple juice
Other
Lead sponsor
University of Florida
Other
Eligibility
21 Years to 65 Years · Female only
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 30, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Heme and Non-heme Iron Intakes, Gut Microbiota, and Influence on Host Iron Absorption

NCT06146608
View directory record Official record
Conditions
Anemia, Iron Deficiency, Iron Overload
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years to 40 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced Oct 20, 2026, 3:13 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Hummus for Health: Dietary Quality and Health Outcomes in Toddlers

NCT02696278
View directory record Official record
Conditions
Obesity
Interventions
Lesson about vegetables, Vegetables, Hummus
Other
Lead sponsor
Baylor College of Medicine
Other
Eligibility
12 Months to 24 Months
Enrollment
139 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jul 17, 2017 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Phase 2 Interventional Results available

Antibiotic "Dysbiosis" in Preterm Infants

NCT02784821
View directory record Official record
Conditions
Enterocolitis, Necrotizing, Bacteremia, Bronchopulmonary Dysplasia, Intraventricular Hemorrhage, Periventricular Leukomalacia, Chronic Lung Disease, Ileal Perforation
Interventions
Antibiotic, Gastric fluid, Breast milk, Stool samples, Antibiotics
Drug · Other
Lead sponsor
University of Florida
Other
Eligibility
23 Weeks to 33 Weeks
Enrollment
98 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Oct 20, 2026, 3:13 AM EDT
Withdrawn Not applicable Interventional

Microbiome Modification to Enhance Stelara Response in Crohn's Disease

NCT04795960
View directory record Official record
Conditions
Crohn Disease
Interventions
Low serine diet, High serine diet
Dietary Supplement
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 12, 2023 · Synced Oct 20, 2026, 3:13 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Modifying Diet to Improve Gut Microbiome

NCT03924778
View directory record Official record
Conditions
Obesity
Interventions
DASH diet, standard American diet
Behavioral
Lead sponsor
H. Lee Moffitt Cancer Center and Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2027
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Sep 17, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
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 Sep 21, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Withdrawn No phase listed Observational

A Pilot Study to Explore the Role of Gut Flora in Metastatic Mesothelioma

NCT04214015
View directory record Official record
Conditions
Mesothelioma, Mesothelioma Malignant, Mesothelioma; Lung, Mesotheliomas Pleural, Mesothelioma Peritoneum, Mesothelioma; Liver, Mesothelioma; Omentum
Interventions
No intervention
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Not applicable Interventional

Mind-body Approach and Gut Microbiota in Osteoarthritis

NCT05186714
View directory record Official record
Conditions
Osteoarthritis
Interventions
Tai Chi versus wellness education
Behavioral
Lead sponsor
Tufts Medical Center
Other
Eligibility
55 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 9, 2025 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut-microbiota Targeted Nutritional Intervention for Gut Barrier Integrity at High Altitude

NCT04111263
View directory record Official record
Conditions
Gastrointestinal Injury, Acute Mountain Sickness
Interventions
FP, Placebo, High altitude, Sea level
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
17 Years to 39 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 23, 2022 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Rescuing the Microbiome Effectively With Different Doses of B. Infantis in Infants

NCT03476447
View directory record Official record
Conditions
Gut Microbiome
Interventions
B. infantis EVC001, Lactose
Other
Lead sponsor
Evolve BioSystems, Inc.
Industry
Eligibility
2 Months to 4 Months
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Apr 19, 2019 · Synced Oct 20, 2026, 3:13 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Evaluation of Milk Polar Lipids in Dyslipidemic Adults With Abdominal Obesity

NCT05700916
View directory record Official record
Conditions
Dyslipidemias, Obesity
Interventions
Milk Polar Lipid-Rich Dairy Powder, Dairy Powder
Drug · Dietary Supplement
Lead sponsor
University of Connecticut
Other
Eligibility
18 Years to 70 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Storrs, Connecticut
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Gut Microbiome and Its Association With Pediatric Stress and Cognition

NCT06269614
View directory record Official record
Conditions
Autism Spectrum Disorder, Adverse Childhood Experiences, Stress Reaction
Interventions
Probiotic
Dietary Supplement
Lead sponsor
Nova Southeastern University
Other
Eligibility
4 Years to 95 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Davie, Florida
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Phage 3Determination of Phage/Probiotic Synergistic Effects on Gastrointestinal Health

NCT05750433
View directory record Official record
Conditions
Gastrointestinal Dysfunction
Interventions
PreforPro+B. subtilis DE111 probiotics, Placebo, B. subtilis DE111
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 27, 2024 · Synced Oct 20, 2026, 3:13 AM EDT
Withdrawn Not applicable Interventional

TNBC Gut Microbiota During Neoadjuvant Treatment

NCT06610097
View directory record Official record
Conditions
Breast Cancer, Triple Negative Breast Cancer, Early Stage Triple-Negative Breast Carcinoma
Interventions
Nutritional Counseling
Other
Lead sponsor
Scripps Health
Other
Eligibility
18 Years to 100 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Aug 12, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Suspended No phase listed Observational Accepts healthy volunteers

A Non-Interventional Pilot Study to Explore the Role of Gut Flora in Disease

NCT04031469
View directory record Official record
Conditions
Gut Microbiome, Gastrointestinal Microbiome, Autism, Autism Spectrum Disorder, Autism Spectrum Disorder High-Functioning, Alzheimer Disease, Alzheimer Dementia (AD), Alzheimer Dementia, Alzheimer Disease (AD), Crohn, Crohn Colitis, Crohn Disease (CD), Crohn Disease Colon, Myalgic Encephalomyelitis, ME/CFS, Myalgic Encephalomyelitis (ME), Myalgic Encephalomyelitis/Chronic Fatigue Syndrome, Psoriasis, Psoriasis Annularis, Psoriasis Chronic, Chronic Urinary Tract Infection, Ulcerative Colitis (Disorder), Ulcerative Colitis (UC), Ulcerative Colitis Acute, Ulcerative Colitis Chronic, Multiple Sclerosis, Multiple Sclerosis (MS) - Relapsing-remitting, Multiple Sclerosis (MS) Primary Progressive, Constipation Chronic Idiopathic, Constipation, Celiac, Celiac Disease, Celiac Sprue, Lyme Arthritis, Lyme Borreliosis, Nervous System, Lyme Disease, Chronic, Cholesterol, Cholesterol Level, High, Cancer, Colon Cancer, Amyotrophic Lateral Sclerosis (ALS), Amyotrophic Lateral Sclerosis, Rheumatoid Arthritis (RA), Rheumatoid Arthritis - Rheumatism, Chronic Fatigue Syndrome (CFS), PARKINSON DISEASE (Disorder), Parkinson Disease, Parkinson Disease (PD), Depression, Major Depressive Disorder (MDD), Depression Disorder, Depression in Adults, Anxiety, Anxiety Disorder Generalized, Obsessive Compulsive Disorder (OCD), Obsessive Compulsive Disorder OCD, Obsessive - Compulsive Disorder, Bipolar, Bipolar 1 Disorder, Bipolar Disorder (BD), Bipolar Disorder I and II, Bipolar and Related Disorders, Migraine, Migraine Disorder, Diabetes (DM), Diabetes, Lupus, Lupus Erythematosus, Epidermolysis Bullosa (EB), Mesothelioma, Mesothelioma Malignant, IBS (Irritable Bowel Syndrome), Irritable Bowel, IBS - Irritable Bowel Syndrome, Irritable Bowel Syndrome (IBS), Eczema, Eczema Atopic Dermatitis, Acne, Myasthaenia Gravis, Gout
Interventions
There is no intervention in this study
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
12 Years and older
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2030
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Sep 21, 2026 · Synced Oct 20, 2026, 3:13 AM EDT
Recruiting Phase 2 Interventional

Trial Targeting Gut Bacterial Androgen Production to Reverse Therapeutic Resistance to Abiraterone in Patients With Metastatic Prostate Cancer

NCT06616597
View directory record Official record
Conditions
Prostate Cancer (Adenocarcinoma), Metastatic Prostate Cancer
Interventions
Abiraterone acetate, Dexamethasone, Metronidazole
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins
Other
Eligibility
18 Years and older · Male only
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2032
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Oct 20, 2026, 3:13 AM EDT