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ClinicalTrials.gov public records Last synced Oct 20, 2026, 10:10 PM EDT

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Showing 289–312 of 985 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Microbiome Clear all
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Novel Nutritional Product on Nutrient Gaps and Gut Health in Active Adults

NCT06521424
View directory record Official record
Conditions
Gastrointestinal Microbiome, Nutrition, Healthy, Exercise
Interventions
AG1 - Nutritional Supplement, Placebo
Dietary Supplement
Lead sponsor
Athletic Greens International
Industry
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Hempstead, New York
Source: ClinicalTrials.gov public record
Updated May 4, 2025 · Synced Oct 20, 2026, 10:10 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Flourish: Exploring the Early Infant Gut Microbiome

NCT07333482
View directory record Official record
Conditions
Microbiota, Gut Microbiome, Eczema, Microbiome
Interventions
Tailored Recommendations, Consult Call, Educational Email Series
Dietary Supplement · Behavioral
Lead sponsor
Seeding Inc
Industry
Eligibility
0 Months to 3 Months
Enrollment
250 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Association of Amino Acid Prevalence and Chronic Brain Injury

NCT02113124
View directory record Official record
Conditions
Chronic Traumatic Brain Injury
Interventions
Not listed
Lead sponsor
Brent Masel
Other
Eligibility
35 Years to 70 Years
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
3
States / cities
Bakersfield, California • Dallas, Texas • Galveston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 15, 2015 · Synced Oct 20, 2026, 10:10 PM EDT
Recruiting Not applicable Interventional

Enhanced Nutritional Optimization in LVAD Trial

NCT05655910
View directory record Official record
Conditions
Heart Failure, Gut Microbiome, Nutritional Deficiency
Interventions
Ensure Surgery Immunonutrition shake
Dietary Supplement
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Oct 31, 2025 · Synced Oct 20, 2026, 10:10 PM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

A Randomized, Double-Blind Study to Assess the Effect of a Postbiotic on Oxidative Stress and Exercise Performance

NCT06795425
View directory record Official record
Conditions
Oxidative Stress, Healthy, Exercise-induced Muscle Damage, Exercise-induced Muscle Soreness, Immune Function, Gut Health, Microbiome Analysis, Exercise Performance, Exercise Metabolism
Interventions
Postbiotic Active Lifestyle Blend, Placebo
Dietary Supplement · Other
Lead sponsor
Lindenwood University
Other
Eligibility
18 Years to 45 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Resistance Training Effects on Gut Microbiome and Cardiometabolic Outcomes

NCT04906525
View directory record Official record
Conditions
Exercise Intervention
Interventions
Resistance training, Conventional physical activity guidelines
Behavioral · Other
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 35 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 13, 2023 · Synced Oct 20, 2026, 10:10 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Persea Americana for Total Health (PATH)-2

NCT05941728
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Avocado, Oil + Fiber, Average American Diet
Other
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
25 Years to 74 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 13, 2023 · Synced Oct 20, 2026, 10:10 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 20, 2026, 10:10 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Development of a Microbiome Non-invasive Diagnosis Tool

NCT03330444
View directory record Official record
Conditions
Infertility of Uterine Origin
Interventions
Endometrial biopsy and endometrial fluid collection
Procedure
Lead sponsor
Igenomix
Industry
Eligibility
18 Years to 50 Years · Female only
Enrollment
452 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
4
States / cities
Norwalk, Connecticut • Margate, Florida • Chesterfield, Missouri + 1 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2020 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Orthodontic Varnish Microbiology Study

NCT04528134
View directory record Official record
Conditions
Dental Caries, Dental Plaque, Dental White Spot
Interventions
Extended Contact RMGI (Resin-modified Glass Ionomer) Varnish, 5% Sodium Fluoride Varnish
Device
Lead sponsor
University of California, Los Angeles
Other
Eligibility
12 Years to 27 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 20, 2026, 10:10 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 20, 2026, 10:10 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Cocoa-rich Bioflavanol Supplementation Effects During Cold Exposure

NCT04359082
View directory record Official record
Conditions
Cold Exposure, Manual Dexterity, Gut Microbiome
Interventions
CocoaVia supplement, Placebo Pill
Dietary Supplement · Other
Lead sponsor
United States Army Research Institute of Environmental Medicine
Federal
Eligibility
18 Years to 49 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Natick, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 30, 2021 · Synced Oct 20, 2026, 10:10 PM EDT
Not yet recruiting No phase listed Observational Accepts healthy volunteers

Stanford University Microbiome Bank

NCT07625059
View directory record Official record
Conditions
Healthy Adult Participants
Interventions
Microbiome bank
Other
Lead sponsor
Sean Spencer
Other
Eligibility
18 Years to 80 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Jun 4, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Recruiting Phase 2 Interventional

Microbiome and Association With Implant Infections

NCT05020574
View directory record Official record
Conditions
Breast Cancer, Breast Cancer Female, Genetic Predisposition to Disease
Interventions
Cephalexin
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Female only
Enrollment
200 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 18, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Recruiting Not applicable Interventional

Impact of Dietary Fiber Supplementation on Colonic Microbiome

NCT05643859
View directory record Official record
Conditions
Benign Colorectal Neoplasm, Non-Neoplastic Anal Disorder
Interventions
Dietary Fiber, Proctoscopy or anoscopy with Biopsy, Colonoscopy, Questionnaire Administration
Dietary Supplement · Procedure · Other
Lead sponsor
OHSU Knight Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 15, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Gut-level Antiinflammatory Activities of Green Tea in Metabolic Syndrome

NCT03973996
View directory record Official record
Conditions
Dysbiosis, Endotoxemia, Metabolic Syndrome, Inflammation
Interventions
Green Tea Extract, Placebo
Dietary Supplement
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 65 Years
Enrollment
46 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 19, 2025 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

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

NCT04877262
View directory record Official record
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
Source: ClinicalTrials.gov public record
Updated Jun 23, 2022 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Investigation of the Gut Microbiome and Statin Response

NCT04098003
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Rosuvastatin, Placebo
Drug
Lead sponsor
Sony Tuteja
Other
Eligibility
18 Years to 65 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2026
U.S. locations
1
States / cities
Phildelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

How Reflux Medications Affect the Microbiome of Infants

NCT03747991
View directory record Official record
Conditions
GERD, Dysbiosis
Interventions
Not listed
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
2 Months to 12 Months
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jun 12, 2024 · Synced Oct 20, 2026, 10:10 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effects of Treatments on Atopic Dermatitis

NCT01631617
View directory record Official record
Conditions
Eczema, Dermatitis, Skin Diseases, Genetic, Dermatitis, Atopic, Skin Diseases
Interventions
Trimethoprim/sulfamethoxazole (TMP/SMZ), Cephalexin, Doxycycline, Sodium hypochlorite, Placebo capsules, Placebo Sodium hypochlorite
Drug · Other
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
2 Years to 50 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 20, 2026, 10:10 PM 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, 10:10 PM EDT
Completed No phase listed Observational

Identifying Biomarkers of Gastro Intestinal Comorbidities in Autism Spectrum Disorder

NCT07744217
View directory record Official record
Conditions
Autism, Gastro Intestinal Diseases
Interventions
Not listed
Lead sponsor
The Center for Discovery
Other
Eligibility
5 Years to 19 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Harris, New York
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Oct 20, 2026, 10:10 PM EDT
Completed No phase listed Observational

Sinusitis in Children and the Nasopharyngeal Microbiome

NCT01492868
View directory record Official record
Conditions
Sinusitis
Interventions
Not listed
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
4 Years to 7 Years
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
2
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 8, 2018 · Synced Oct 20, 2026, 10:10 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

ButyraGen™, Short Chain Fatty Acids and Gut Microbiome

NCT05601635
View directory record Official record
Conditions
Healthy
Interventions
ButyraGen™
Dietary Supplement
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 25, 2023 · Synced Oct 20, 2026, 10:10 PM EDT