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ClinicalTrials.gov public records Last synced Oct 23, 2026, 6:29 PM EDT

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Showing 553–576 of 1,015 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Microbiome Clear all
Active, not recruiting No phase listed Observational

Leveraging Artificial Intelligence and Multi-Omics Data to Predict Opioid Addiction

NCT06540105
View directory record Official record
Conditions
Opioid Use Disorder, Addiction, Opioid
Interventions
Not listed
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 7, 2026 · Synced Oct 23, 2026, 6:29 PM EDT
Terminated No phase listed Observational Accepts healthy volunteers

Microbiome in Colorectal Cancer Onset and Progression

NCT05368688
View directory record Official record
Conditions
Colorectal Cancer, Tumor, CRC, GI Cancer, Gastrointestinal Cancer
Interventions
Not listed
Lead sponsor
Viome
Industry
Eligibility
50 Years to 80 Years
Enrollment
63 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
1
States / cities
Bellevue, Washington
Source: ClinicalTrials.gov public record
Updated Dec 27, 2022 · Synced Oct 23, 2026, 6:29 PM 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 17, 2025 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional

The Effect of Isosorbide Diesters Based Moisturizer on Skin Health

NCT04831892
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Moisturizer Containing Isosorbide Diesters and Colloidal Oatmeal, Moisturizer containing Colloidal Oatmeal only
Other
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 9, 2022 · Synced Oct 23, 2026, 6:29 PM EDT
Recruiting Not applicable Interventional

High-Intensity Exercise and High-Fiber Diet for Immunotherapy Outcomes in Melanoma Patients: The DUO Trial

NCT06298734
View directory record Official record
Conditions
Melanoma (Skin), Skin Cancer, Advanced Melanoma
Interventions
Exercise Program, Diet Program
Behavioral
Lead sponsor
Fred Hutchinson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
2
States / cities
Boston, Massachusetts • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Oct 23, 2026, 6:29 PM EDT
Enrolling by invitation No phase listed Observational

Enabling Microbiomics- Driven Personalized Nutrition

NCT06657001
View directory record Official record
Conditions
Inflammatory Bowel Disease (IBD), Irritable Bowel Syndrome (IBS), Celiac Disease, Diarrhea, Constipation, Microbiome, Crohn's Disease, UC - Ulcerative Colitis, Microscopic Colitis, Functional Dyspepsia
Interventions
Not listed
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
4,001 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 12, 2026 · Synced Oct 23, 2026, 6:29 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Synbiotic to Attenuate Resorption of the Skeleton

NCT06389539
View directory record Official record
Conditions
Osteoporosis, Inflammation, Aging
Interventions
SBD111 medical food, Placebo
Other
Lead sponsor
Hebrew SeniorLife
Other
Eligibility
60 Years and older · Female only
Enrollment
220 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Roslindale, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 17, 2026 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional

Optimizing Overactive Bladder Treatment

NCT03904407
View directory record Official record
Conditions
Overactive Bladder
Interventions
Lactobacillus Probiotic Capsule, Matching Lactobacillus Probiotic Placebo Capsule
Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
2
States / cities
Hillsborough, North Carolina • Raleigh, North Carolina
Source: ClinicalTrials.gov public record
Updated May 11, 2020 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional Results available

Hidradenitis Suppurativa (HS) Tunneling Wounds

NCT04648631
View directory record Official record
Conditions
Hidradenitis Suppurativa
Interventions
antibiofilm surfactant wound gel (ABWG)
Device
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Apr 2, 2024 · Synced Oct 23, 2026, 6:29 PM 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 19, 2017 · Synced Oct 23, 2026, 6:29 PM EDT
Terminated Phase 1Phase 2 Interventional

Fecal Microbial Transplant in Pediatric Crohn's Disease

NCT02272868
View directory record Official record
Conditions
Crohn's Disease
Interventions
Fecal Microbial transplant, Normal Saline, rifaximin+omeprazole+miralax
Biological · Drug
Lead sponsor
Seattle Children's Hospital
Other
Eligibility
12 Years to 21 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Sep 29, 2021 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study of Triphala and Rubia Cordifolia on Gut Microbiome and Skin

NCT03477825
View directory record Official record
Conditions
Sebum Production, Stool Microbiome, Transepidermal Water Loss, Facial Brrightness, Erythema, Wrinkles, Facial Shine
Interventions
Placebo Oral Tablet, Rubia Cordifolia, Triphala
Dietary Supplement
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years to 60 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 15, 2019 · Synced Oct 23, 2026, 6:29 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Almonds, Gut Microbiome and Kids

NCT07636850
View directory record Official record
Conditions
Dysbiosis, Cardiometabolic Health Indicators
Interventions
Creamy Richards 100% Almonds! Creamy Natural Almond Butter, Cadbury Milk Chocolate Spread
Other
Lead sponsor
Florida State University
Other
Eligibility
6 Years to 13 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2028
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effect of Mouthwashes on Oral Wound Healing and Microbiome

NCT05270382
View directory record Official record
Conditions
Wound Heal, Oral Microbiome
Interventions
cetylpyridinium chloride
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 45 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 22, 2024 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effect of Grape Consumption on Increasing the Good Bacteria in the Human Intestine

NCT05025189
View directory record Official record
Conditions
Healthy
Interventions
Table Grape Powder, Beige Diet
Other
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 6, 2023 · Synced Oct 23, 2026, 6:29 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Probiotics on the Microbiome and Lipidome in Acne Vulgaris

NCT04596748
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
13 Years to 45 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2021
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Nov 24, 2020 · Synced Oct 23, 2026, 6:29 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 23, 2026, 6:29 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

The Effect of PPI Therapy on Weight, Gut Microbiome, and Expression of GPR41 and GPR43

NCT02457104
View directory record Official record
Conditions
Gastroesophageal Reflux Disease, Obesity
Interventions
Colonoscopy, Weight and diet questionnaire
Procedure · Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
40 Years to 59 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2021
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 23, 2026, 6:29 PM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Descriptive Analysis of Gut Microbiome Alterations in Hyperoxaluric Patients

NCT02794649
View directory record Official record
Conditions
Oxalate, Primary Hyperoxaluria, Microbiome
Interventions
Not listed
Lead sponsor
VA New York Harbor Healthcare System
Federal
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 26, 2017 · Synced Oct 23, 2026, 6:29 PM EDT
Completed No phase listed Observational

Assessing the Impact of the Microbiome on Breast Cancer Radiotherapy Toxicity

NCT04245150
View directory record Official record
Conditions
DCIS, Invasive Breast Cancer
Interventions
Stool sample, Skin Swab Sample
Other
Lead sponsor
Case Comprehensive Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
23 participants
Timeline
2019 – 2024
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Not applicable Interventional

The Gut Microbiome As an Indicator of Readiness for Head & Neck Cancer Surgery

NCT05061316
View directory record Official record
Conditions
Cancer of Head and Neck, Nutrition Aspect of Cancer
Interventions
Nestlé Impact Advanced Recovery
Dietary Supplement
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Feb 14, 2025 · Synced Oct 23, 2026, 6:29 PM EDT
Completed No phase listed Observational

Functional Dyspepsia Microbiome Study

NCT02340312
View directory record Official record
Conditions
Functional Dyspepsia
Interventions
EGD, Collection of Stool Specimens
Procedure · Other
Lead sponsor
Children's Mercy Hospital Kansas City
Other
Eligibility
8 Years to 17 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
Kansas City, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 23, 2026, 6:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Providing Personally Tailored Dietary Suggestions Using Individual Microbiome and Glycemic Index Response.

NCT02945514
View directory record Official record
Conditions
Healthy Volunteers
Interventions
DayTwo machine learning algorithm
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
327 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 28, 2018 · Synced Oct 23, 2026, 6:29 PM EDT
Completed Phase 4 Interventional Results available

Effects of Interleukin (IL)- 4R-alpha Inhibition on Respiratory Microbiome and Immunologic Correlates in Severe Asthma

NCT05036733
View directory record Official record
Conditions
Asthma
Interventions
Dupilumab
Drug
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 23, 2024 · Synced Oct 23, 2026, 6:29 PM EDT