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Showing 1–24 of 101 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Microbiome Capsule Clear all
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of a Commercially Available Synbiotic on the Gut Microbiome and Cardiometabolic Health

NCT07515443
View directory record Official record
Conditions
Hypertension, Gut Dysbiosis, Overweight , Obesity
Interventions
Synbiotic, Placebo
Dietary Supplement
Lead sponsor
Southern Utah University
Other
Eligibility
18 Years to 60 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025
U.S. locations
1
States / cities
Cedar, Utah
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 6, 2026, 10:02 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 25, 2021 · Synced Sep 6, 2026, 10:02 AM EDT
Active, not recruiting Not applicable Interventional

Can Gut Bacteria Predict Who Benefits Most From Exercise? A Gut Supplement to Help Exercise Non-Responders

NCT07180446
View directory record Official record
Conditions
Obesity &Amp; Overweight
Interventions
Cardiovascular Exercise, Butyrate
Behavioral · Dietary Supplement
Lead sponsor
Texas Christian University
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Gut Microbiome Response to Long-Haul Travel in Elite Football Players

NCT07585474
View directory record Official record
Conditions
Microbial Composition, Immune Function
Interventions
Probiotic Capsule, Placebo
Drug
Lead sponsor
Sheffield Hallam University
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 12, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

LpD3.5 Intervention Study in Older Adults- LISA-I Trial

NCT07794956
View directory record Official record
Conditions
Mild Cognitive Impairment (MCI), Cognition, Brain Aging, Microbiome Dysbiosis, Leaky Gut Syndrome, Gut Inflammation, Inflammaging
Interventions
LpD3.5, Placebo
Dietary Supplement
Lead sponsor
University of South Florida
Other
Eligibility
60 Years and older
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Tampa, Florida
Source: ClinicalTrials.gov public record
Updated Aug 30, 2026 · Synced Sep 6, 2026, 10:02 AM 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 Aug 27, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Aronia Berries on Vascular Endothelial Function and the Gut Microbiota in Middle-Aged/Older Adults

NCT03824041
View directory record Official record
Conditions
Endothelial Dysfunction, Aging
Interventions
Aronia full spectrum - half dose, Aronia full spectrum - full dose, Placebo
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
45 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 2, 2023 · Synced Sep 6, 2026, 10:02 AM EDT
Completed No phase listed Observational

The Microenvironment in Barrett's Esophagus

NCT03060642
View directory record Official record
Conditions
Barrett Esophagus, Esophageal Adenocarcinoma
Interventions
Tethered capsule sponge, Electronic nose device
Device
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
155 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
3
States / cities
Rochester, Minnesota • New York, New York • Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 4, 2024 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Probiotics Effect on the Female Urinary Microbiome ProFUM Trial (Probiotics Effect on the Female Urinary Microbiome)

NCT03250208
View directory record Official record
Conditions
Healthy
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Loyola University
Other
Eligibility
18 Years and older · Female only
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Maywood, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 31, 2019 · Synced Sep 6, 2026, 10:02 AM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 37000: Immunity and Microbiome Studies at Intestinal and Systemic Sites in Ty21a Vaccinated Adults

NCT03970304
View directory record Official record
Conditions
Typhoid Vaccination
Interventions
Vivotif Typhoid Oral Vaccine
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
87 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Gene Expression, Metabolomic, Microbiome, and Calcium Metabolism in Response to Varied Vitamin D Dosages

NCT02856776
View directory record Official record
Conditions
Vitamin D Insufficiency
Interventions
Vitamin D3
Dietary Supplement
Lead sponsor
Boston University
Other
Eligibility
18 Years to 50 Years
Enrollment
39 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 17, 2019 · Synced Sep 6, 2026, 10:02 AM 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 27, 2025 · Synced Sep 6, 2026, 10:02 AM EDT
Recruiting Not applicable Interventional

Efficacy of Viome's Precision Nutrition Program Towards Reducing HbA1c

NCT06185192
View directory record Official record
Conditions
Diabetes
Interventions
Viome's Precision Nutrition Program (VPNP)
Dietary Supplement
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Bothell, Washington
Source: ClinicalTrials.gov public record
Updated Jan 28, 2025 · Synced Sep 6, 2026, 10:02 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

CVD 38000: Study of Responses to Vaccination With Typhoid and/or Cholera

NCT03705585
View directory record Official record
Conditions
Typhoid and/or Cholera Vaccination
Interventions
Vivotif Typhoid Oral Vaccine, Vaxchora
Drug
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years and older
Enrollment
240 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2029
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 3, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Azithromycin Treatment for the Airway Microbiome in Asthma

NCT03736629
View directory record Official record
Conditions
Asthma Chronic
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 55 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 22, 2023 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Spice Consumption on the Microbiome

NCT03676803
View directory record Official record
Conditions
Microbiota
Interventions
mixed spices, placebo capsule containing 5 g of maltodextrin
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 65 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 18, 2019 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effect of Aspirin on Gut Microbiome

NCT02761486
View directory record Official record
Conditions
Healthy
Interventions
Aspirin, Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
50 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2020 · Synced Sep 6, 2026, 10:02 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

iVS-1 Probiotic Intervention Targeting Biological Aging in Midlife Adults

NCT07407894
View directory record Official record
Conditions
Healthy Aging, Anti Aging
Interventions
Bifidobacterium adolescentis iVS-1, Placebo
Dietary Supplement
Lead sponsor
Synbiotic Health
Industry
Eligibility
40 Years to 75 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
New Port Richey, Florida
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Not listed Phase 1Phase 2 Interventional

Safety Evaluation of Fecal Microbiota Transplantation in Severe Alcoholic Hepatitis

NCT05006430
View directory record Official record
Conditions
Alcoholic Hepatitis
Interventions
Fecal Microbiota Transplantation, Placebo
Biological · Other
Lead sponsor
Prasun Kumar Jalal
Other
Eligibility
18 Years to 75 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jan 22, 2025 · Synced Sep 6, 2026, 10:02 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Botanical Blend on the Gut Microbiome and Gut-Skin-Axis in Small Intestinal Bacterial Overgrowth (SIBO)

NCT04867512
View directory record Official record
Conditions
Small Intestinal Bacterial Overgrowth (SIBO)
Interventions
Liquid Tincture, GI Detox, Olivirex
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
18 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 3, 2021 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Phase 4 Interventional Results available

Vitamin D and Prebiotics for Intestinal Health in Cystic Fibrosis

NCT04118010
View directory record Official record
Conditions
Cystic Fibrosis, Dysbiosis
Interventions
Vitamin D3, Placebo vitamin D3, Inulin, Placebo Inulin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Feb 6, 2024 · Synced Sep 6, 2026, 10:02 AM EDT
Recruiting Phase 1Phase 2 Interventional

COffee and Metabolites Modulating the Gut MicrobiomE in Colorectal caNCER

NCT05692024
View directory record Official record
Conditions
Colorectal Cancer, Coffee, Gastrointestinal Microbiome, Stenosis, Fibrosis, Liver, Ultrasound Elastography, Proton Magnetic Resonance Spectroscopy
Interventions
Nestlé NESCAFÉ® TASTER'S CHOICE® House Blend capsule., Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2028
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 4, 2026 · Synced Sep 6, 2026, 10:02 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

MiCrobiome dieT Study

NCT03610477
View directory record Official record
Conditions
Healthy
Interventions
Medium chain triglycerides, Long chain triglycerides
Dietary Supplement
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 31, 2019 · Synced Sep 6, 2026, 10:02 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 Sep 6, 2026, 10:02 AM EDT