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ClinicalTrials.gov public records Last synced Oct 24, 2026, 11:31 PM EDT

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Showing 793–816 of 1,015 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Microbiome Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Mango Intake and Gut and Cardiometabolic Health in Hispanic/Latino Adolescents

NCT07125001
View directory record Official record
Conditions
Cardiometabolic Health Indicators, Vascular Function in Healthy Volunteers, Inflammation
Interventions
Ataulfo mango
Other
Lead sponsor
University of California, Davis
Other
Eligibility
12 Years to 19 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Study of Early Enteral Dextrose in Sepsis

NCT03454087
View directory record Official record
Conditions
Sepsis
Interventions
Enteral Dextrose Infusion, Free Water Infusion
Other
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 7, 2020 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Effects of Prebiotic Supplementation and Exercise on Inflammatory Markers, Vascular Function and Cognition in CKD

NCT03689569
View directory record Official record
Conditions
Chronic Kidney Diseases
Interventions
Resistant starch, Exercise, Starch
Dietary Supplement · Behavioral
Lead sponsor
Springfield College
Other
Eligibility
30 Years to 75 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 24, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed No phase listed Observational

Intestinal Microbiome, Oral Microbiome, and Whole Blood Transcriptome Analyses in Gastrointestinal Malignancies

NCT05462314
View directory record Official record
Conditions
Gastrointestinal Cancer, Pancreatic Cancer, Esophageal Cancer, Gastric Cancer, Rectal Cancer, Liver Cancer, Biliary Cancer
Interventions
Not listed
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting Phase 2 Interventional

Adding a Live Biotherapeutic Product (CBM588) to Pembrolizumab for the Treatment of Renal Cell Cancer After Surgery

NCT07037004
View directory record Official record
Conditions
Clear Cell Renal Cell Carcinoma, Sarcomatoid Renal Cell Carcinoma, Stage II Renal Cell Cancer AJCC v8, Stage III Renal Cell Cancer AJCC v8, Stage IV Renal Cell Cancer AJCC v8
Interventions
Biospecimen Collection, Clostridium butyricum CBM588 Strain, Computed Tomography, Pembrolizumab
Procedure · Drug · Biological
Lead sponsor
City of Hope Medical Center
Other
Eligibility
18 Years and older
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Duarte, California • Irvine, California
Source: ClinicalTrials.gov public record
Updated Oct 19, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Novel Mechanisms and Approaches to Treat Neonatal Sepsis

NCT02554630
View directory record Official record
Conditions
Complication of Prematurity, Immunologic Deficiency Syndromes
Interventions
Adjuvant, Blood Collection
Other
Lead sponsor
University of Florida
Other
Eligibility
Up to 55 Years
Enrollment
142 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 10, 2023 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting No phase listed Observational

Role of Gut Microbiome in Cancer Therapy

NCT05112614
View directory record Official record
Conditions
Hematopoietic and Lymphoid Cell Neoplasm, Malignant Solid Neoplasm
Interventions
Biospecimen Collection, Electronic Health Record Review
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 99 Years
Enrollment
3,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2030
U.S. locations
3
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting Not applicable Interventional

Efficacy of Viome's Precision Nutrition Program Towards Reducing HbA1c

NCT05465616
View directory record Official record
Conditions
Diabetes, Pre Diabetes
Interventions
Viome's Precision Nutrition Program (VPNP)
Dietary Supplement
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jan 24, 2025 · Synced Oct 24, 2026, 11:31 PM EDT
Completed No phase listed Observational

Study of Variation Over Time in the Oral Microbiome

NCT02049398
View directory record Official record
Conditions
Microbiota, Oral Health, Body Mass Index
Interventions
Not listed
Lead sponsor
National Cancer Institute (NCI)
NIH
Eligibility
18 Years and older
Enrollment
41 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 27, 2020 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Phase 2 Interventional

Elemental Diet for Treatment of Inflammatory Bowel Disease in Patients With Chronic Granulomatous Disease

NCT03983837
View directory record Official record
Conditions
Chronic Granulomatous Disease, Inflammatory Bowel Disease
Interventions
Neocate Splash
Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
8 Years to 65 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 11, 2025 · Synced Oct 24, 2026, 11:31 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Gut Microbiome, Metabolome, and SSBP

NCT07790900
View directory record Official record
Conditions
Salt-sensitivity of Blood Pressure
Interventions
Dietary sodium
Other
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
50 Years to 70 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2031
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 4, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting No phase listed Observational

Evaluating the Association Among Changes in Gut Microbiome, Fatigue, and Chemotherapy-Induced Nausea in Early Stage Breast Cancer

NCT05417867
View directory record Official record
Conditions
Chemotherapy-Related Nausea and/or Vomiting, Early Stage Breast Carcinoma, Anatomic Stage I Breast Cancer AJCC v8, Anatomic Stage II Breast Cancer AJCC v8
Interventions
Biospecimen Collection, Questionnaire Administration
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
20 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
5
States / cities
Scottsdale, Arizona • Jacksonville, Florida • Albert Lea, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

A Study of Virtually Supervised Mouth Rinses and Flossing

NCT05600231
View directory record Official record
Conditions
Healthy
Interventions
LISTERINE COOL MINT Antiseptic Mouthwash, LISTERINE COOL MINT ZERO Alcohol Mouthwash, Reach Unflavored Waxed Dental Floss, Colgate Cavity Protection Toothpaste
Other
Lead sponsor
Johnson & Johnson Consumer Inc. (J&JCI)
Industry
Eligibility
18 Years and older
Enrollment
284 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Fort Wayne, Indiana
Source: ClinicalTrials.gov public record
Updated Jun 18, 2023 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Not applicable Interventional

Childhood Obesity Microbiome Study

NCT04770311
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Microbiome friendly diet
Behavioral
Lead sponsor
Duke University
Other
Eligibility
6 Years to 11 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 15, 2022 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Skin Microbial Ecology in Atopic Dermatitis

NCT04170244
View directory record Official record
Conditions
Atopic Dermatitis, Psoriasis, Healthy
Interventions
AD subject visit sampling procedures, PS subject visit sampling procedures, Healthy control visit sampling procedures
Other
Lead sponsor
University of Rochester
Other
Eligibility
13 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet Modulation of Bacterial Sulfur and Bile Acid Metabolism and Colon Cancer Risk

NCT03550885
View directory record Official record
Conditions
Colorectal Cancer
Interventions
High taurine and saturated fat diet, Low in taurine and saturated fat diet
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Examining the Distal Gut Microbiome After Spinal Cord Injury

NCT03319225
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Not listed
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Oct 9, 2018 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting Not applicable Interventional

Gut Microbiome and Sex as Risk Factors for Kidney Stones After Bariatric Surgery

NCT04590690
View directory record Official record
Conditions
Bariatric Surgery Candidate
Interventions
Special diet
Other
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 130 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 11, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Recruiting Phase 1Phase 2 Interventional

Nisin in Oral Cavity Squamous Cell Carcinoma (OCSCC)

NCT06097468
View directory record Official record
Conditions
Oral Cavity Squamous Cell Carcinoma
Interventions
NisinZ® P, Surgery (non-interventional, standard of care)
Drug · Procedure
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 24, 2026, 11:31 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Role of Intestinal Inflammation in the Pathogenesis of Type 1 Diabetes

NCT01940835
View directory record Official record
Conditions
Type 1 Diabetes
Interventions
Upper endoscopy with small bowel biopsies and brushings., Blood draw, Stool sample
Procedure · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 60 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 2, 2022 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Intravenous (IV) Omadacycline on Gut Microbiome

NCT05515562
View directory record Official record
Conditions
Microbial Colonization
Interventions
Omadacycline Injection
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 40 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 17, 2025 · Synced Oct 24, 2026, 11:31 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Influence of Personal Care Products on the Skin Microbiome

NCT03819179
View directory record Official record
Conditions
Microbiome
Interventions
Burt's Bees Serum, Burt's Bees Serum with Biulin, Burt's Bees Serum with Bonicell, Burt's Bees Serum with Berenew Complex, Burt's Bees Serum with Ecoskin
Other
Lead sponsor
University of California, Davis
Other
Eligibility
20 Years to 45 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 28, 2019 · Synced Oct 24, 2026, 11:31 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 13, 2021 · Synced Oct 24, 2026, 11:31 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Microbiome, Anxiety and Cognitive Orientation Study

NCT05388630
View directory record Official record
Conditions
Anxiety, Microbiome, Mood Disorders, Neurodegeneration, Depression
Interventions
Not listed
Lead sponsor
Endominance
Industry
Eligibility
18 Years and older
Enrollment
2,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Dec 14, 2022 · Synced Oct 24, 2026, 11:31 PM EDT