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Showing 1–24 of 91 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Human Microbiome Clear all
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Mechanism of Microbiome-induced Insulin Resistance in Humans (Aim 1)

NCT02124759
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
Sevelamer, Synbiotic, Maltodextrin, High Fat diet, Low Fat diet
Drug · Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Oct 14, 2021 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Longitudinal Study of the Human Intestinal Microbiome

NCT00832286
View directory record Official record
Conditions
Dysbacteriosis
Interventions
Ciprofloxacin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 28, 2021 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Prolonged Fasting on Microbiome and HDL

NCT03487679
View directory record Official record
Conditions
Fasting
Interventions
Fasting
Other
Lead sponsor
University of California, Davis
Other
Eligibility
20 Years to 80 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Sep 26, 2018 · Synced Jun 27, 2026, 3:11 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Effects of Triphala and VSL#3 Probiotic Supplementation on Stool Microbiome Profiles and Inflammation

NCT03907501
View directory record Official record
Conditions
Human Microbiome
Interventions
Synbiotic, Probiotic, Placebo
Dietary Supplement
Lead sponsor
University of California, San Diego
Other
Eligibility
65 Years and older
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2023 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Assessing Uniqueness of Inflammatory Bowel Disease Related Microbiome-derived Biomarkers

NCT05640583
View directory record Official record
Conditions
Irritable Bowel Disease
Interventions
Hygieacare System
Device
Lead sponsor
HyGIeaCare, Inc.
Industry
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 26, 2023 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Pill

NCT07243756
View directory record Official record
Conditions
Healthy
Interventions
3D-printed ingestible pill
Device
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced Jun 27, 2026, 3:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Sources of Bacterial Contamination in Human Milk Samples From the MiLC Trial

NCT03371511
View directory record Official record
Conditions
Bacterial Communities
Interventions
Not listed
Lead sponsor
Cornell University
Other
Eligibility
18 Years and older · Female only
Enrollment
52 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Ithaca, New York
Source: ClinicalTrials.gov public record
Updated Jan 13, 2019 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Results available

Multisensory Early Oral Administration of Human Milk in Preterm Infants

NCT06230848
View directory record Official record
Conditions
Infant Development, Stress
Interventions
Multisensory Early Oral Administration of Human Milk (M-MILK)
Other
Lead sponsor
Loyola University
Other
Eligibility
0 Years to 1 Year
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 7, 2026 · Synced Jun 27, 2026, 3:11 AM EDT
Withdrawn No phase listed Observational Accepts healthy volunteers

Study of the Human Skin Microbiome

NCT00764608
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
Southwest Regional Wound Care Center
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Nov 25, 2015 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Effects of Crofelemer on the Gut Microbiome in Healthy Volunteers and in HIV+ Patients With Non-Infectious Diarrhea

NCT04192487
View directory record Official record
Conditions
Acquired Immunodeficiency Syndrome, Healthy Volunteers, HIV/AIDS, HIV Diarrhea, Human Immunodeficiency Virus
Interventions
Crofelemer delayed-release tablets 125mg
Drug
Lead sponsor
Napo Pharmaceuticals, Inc.
Industry
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
3
States / cities
Tustin, California • Stratford, Connecticut • Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 21, 2021 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of S. Boulardii and Amoxicillin/Clavulanate on Gut Microbiota

NCT01473368
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Saccharomyces boulardii, Amoxicillin Clavulanate
Dietary Supplement · Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Mechanism of Microbiome-induced Insulin Resistance in Humans (Aim2)

NCT02127125
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
Maltodextrin, Synbiotic, Sevelamer
Drug
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
18 Years to 65 Years
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Sep 10, 2020 · Synced Jun 27, 2026, 3:11 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Food DNA Digestion

NCT06687226
View directory record Official record
Conditions
Digestion Rate
Interventions
Reconstitutable food powder
Dietary Supplement
Lead sponsor
Duke University
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Jun 27, 2026, 3:11 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Probiotics on the Shift in Gut Microbiome and Skin Carotenoid Levels

NCT04841694
View directory record Official record
Conditions
Human Microbiome
Interventions
Probiotic
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
40 Years and older
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 2, 2021 · Synced Jun 27, 2026, 3:11 AM 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 Jun 27, 2026, 3:11 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

WHNRC (Western Human Nutrition Research Center) Fiber Intervention Study

NCT04543877
View directory record Official record
Conditions
Inflammation, Vaccine, Intestinal Permeability, Typhoid Fever
Interventions
Inulin, Maltodextrin, Ty21a Typhoid Fever Vaccine
Dietary Supplement · Biological
Lead sponsor
USDA, Western Human Nutrition Research Center
Federal
Eligibility
18 Years to 59 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Dec 16, 2025 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional

Oropharyngeal Administration of Mother's Colostrum for Premature Infants (NS-72393-360)

NCT02116699
View directory record Official record
Conditions
Infection, Enterocolitis, Necrotizing, Ventilator-associated Pneumonia
Interventions
oropharyngeal mother's milk, oropharyngeal sterile water
Other
Lead sponsor
Endeavor Health
Other
Eligibility
1 Day to 4 Days
Enrollment
260 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2022
U.S. locations
5
States / cities
Miami, Florida • Evanston, Illinois • Park Ridge, Illinois + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 28, 2023 · Synced Jun 27, 2026, 3:11 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Reducing Metabolic Dysregulation in Dyads

NCT06117241
View directory record Official record
Conditions
Colorectal Cancer, Inflammation, Nutrition Related Cancer
Interventions
IMAGINE HEALTHY
Behavioral
Lead sponsor
University of South Carolina
Other
Eligibility
9 Years to 55 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Columbia, South Carolina
Source: ClinicalTrials.gov public record
Updated Jan 28, 2026 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Choline From Eggs vs. Supplements on the Generation of TMAO in Humans

NCT03039023
View directory record Official record
Conditions
Cardiovascular Risk Factor
Interventions
Choline Bitartrate, Pre-cooked, pre-peeled whole hardboiled eggs, Egg whites from pre-cooked, pre-peeled hardboiled eggs, Phosphatidylcholine capsules
Dietary Supplement · Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years and older
Enrollment
86 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2020
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 3, 2025 · Synced Jun 27, 2026, 3:11 AM EDT
Not yet recruiting Phase 4 Interventional

Impact of Probiotics on Gut Microbiome During Antibiotic Prophylaxis in Elective Orthopedic Surgery

NCT06791993
View directory record Official record
Conditions
Dysbiosis, Gut -microbiota, Microbiome Analysis, Probiotic, Antibiotic Prophylaxis
Interventions
Placebo Capsule, Probiotic with Human Milk Oligosaccharides (HMO)
Drug · Dietary Supplement
Lead sponsor
Acibadem Maslak Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Jun 27, 2026, 3:11 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Potential Restoration of the Infant Microbiome

NCT02407184
View directory record Official record
Conditions
Human Microbiome
Interventions
Newborn exposure to mother vaginal microbiota
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 40 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 11, 2018 · Synced Jun 27, 2026, 3:11 AM EDT
Recruiting Phase 1Phase 2 Interventional

Probiotics and Gut Health

NCT03418857
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Yogurt smoothie with BB-12, Yogurt smoothie
Drug
Lead sponsor
Penn State University
Other
Eligibility
55 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Dec 13, 2021 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Milk and Infant Intestinal Microbiome Study

NCT03181269
View directory record Official record
Conditions
Breast Feeding, Human Microbiome
Interventions
Intervention education, Placebo Education
Other
Lead sponsor
University of Virginia
Other
Eligibility
Not listed
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 20, 2018 · Synced Jun 27, 2026, 3:11 AM EDT
Completed Not applicable Interventional

Food Preparation Effects on Gut Bacteria in Patients on Peritoneal Dialysis

NCT02467530
View directory record Official record
Conditions
End Stage Renal Disease (ESRD)
Interventions
AGE
Other
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 18, 2017 · Synced Jun 27, 2026, 3:11 AM EDT