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ClinicalTrials.gov public records Last synced Oct 20, 2026, 9:23 AM EDT

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Showing 193–216 of 985 matching trials from the live ClinicalTrials.gov search.
Filters: Condition: Microbiome Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

Comprehensive Outcomes for After Cancer Health

NCT05349227
View directory record Official record
Conditions
Ovarian Cancer, Breast Cancer, Lung Cancer, Gastric Cancer, Survivorship, Endometrial Cancer, Head and Neck Cancers, Prostate Cancers, Geriatric Oncology, Metastatic Breast Cancer, Metastatic Cancer
Interventions
Digital Health Coaching Program, Fitbit
Behavioral · Device
Lead sponsor
Pack Health
Industry
Eligibility
18 Years and older
Enrollment
625 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
7
States / cities
Gainesville, Florida • Boston, Massachusetts • Omaha, Nebraska + 3 more
Source: ClinicalTrials.gov public record
Updated Dec 11, 2024 · Synced Oct 20, 2026, 9:23 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Evaluation of a Postcoital Sponge on Self-Reported Vaginal Health Parameters

NCT06530186
View directory record Official record
Conditions
Vaginal Infection, Vaginal Discharge, Vaginosis, Sexual Dysfunction
Interventions
LiviWell Postcoital Vaginal Insert
Device
Lead sponsor
Atlantic Health System
Other
Eligibility
18 Years and older · Female only
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Mountain Lakes, New Jersey
Source: ClinicalTrials.gov public record
Updated Jul 31, 2024 · Synced Oct 20, 2026, 9:23 AM EDT
Active, not recruiting Not applicable Interventional

A Clinical Trial to Evaluate the Effects of a Fibre Supplement on Microbiome and Gut Health

NCT07781488
View directory record Official record
Conditions
Gut Health, Microbiome, Bloating, Indigestion, Constipation, Diarrhea, Food Cravings, Abdominal Discomfort, Bowel Movement Irregularity
Interventions
Essential Fibre+
Dietary Supplement
Lead sponsor
Artah Nutrition Limited
Industry
Eligibility
21 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Gastrointestinal Tract Microbiome in Healthy Term Infants Receiving Mother'S-own Breast Milk or Cow's Milk-based Infant Formulas

NCT04059666
View directory record Official record
Conditions
Gastrointestinal Microbiome
Interventions
Investigational, Control
Other
Lead sponsor
Mead Johnson Nutrition
Industry
Eligibility
7 Days to 18 Days
Enrollment
57 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
5
States / cities
Birmingham, Alabama • Altamonte Springs, Florida • Owensboro, Kentucky + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2022 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Feasibility of Rice Bran Supplementation in Children

NCT02557373
View directory record Official record
Conditions
Dietary Rice Bran Supplementation
Interventions
Vitamin A, Rice Bran + Vitamin A
Dietary Supplement
Lead sponsor
Colorado State University
Other
Eligibility
4 Months to 10 Months
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 21, 2017 · Synced Oct 20, 2026, 9:23 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Gut Microbiomes in HD

NCT06448546
View directory record Official record
Conditions
Huntington Disease
Interventions
Not listed
Lead sponsor
University of Central Florida
Other
Eligibility
18 Years and older
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Jun 18, 2025 · Synced Oct 20, 2026, 9:23 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Assessing the Gut Microbiome and Its Association With Pediatric Stress and Cognition

NCT06269614
View directory record Official record
Conditions
Autism Spectrum Disorder, Adverse Childhood Experiences, Stress Reaction
Interventions
Probiotic
Dietary Supplement
Lead sponsor
Nova Southeastern University
Other
Eligibility
4 Years to 95 Months
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
Davie, Florida
Source: ClinicalTrials.gov public record
Updated Feb 25, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Gut Butyrate and Blood Pressure in African Americans

NCT04415333
View directory record Official record
Conditions
Hypertension
Interventions
Sodium Butyrate 5 mmol, Sodium Butyrate 80 mmol
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
30 Years to 50 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Greensboro, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 18, 2023 · Synced Oct 20, 2026, 9:23 AM EDT
Not yet recruiting Not applicable Interventional

Fermented Foods and Bowel Health in SCI

NCT07640152
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
fermented foods, Control diet, Sitz Marker Test
Other · Device
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 70 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional

Feasibility and Potential Efficacy of Herbs and Spices for Improving Dietary Quality in College Students: A Pilot Study

NCT07082348
View directory record Official record
Conditions
Dietary Quality, Feasibility Studies, College Student, Dietary Guidelines for Americans, Gut Microbiome, Lipid Profiles, Herbs and Spices, Acceptability, Inflammation Biomarkers, Body Composition, Anthropometrics
Interventions
Herbs and Spices Nutrition Education Program
Behavioral
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
18 Years to 39 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Oct 7, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed No phase listed Observational

The Microbiome in Parkinson's Disease

NCT03129451
View directory record Official record
Conditions
Parkinson Disease
Interventions
Microbiome specimens in stool
Diagnostic Test
Lead sponsor
Corewell Health West
Other
Eligibility
Not listed
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Grand Rapids, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 8, 2024 · Synced Oct 20, 2026, 9:23 AM EDT
Suspended Not applicable Interventional Accepts healthy volunteers

The Healthy Diet and Lifestyle Study II

NCT05132686
View directory record Official record
Conditions
Intra-Abdominal Fat
Interventions
IER+MED, MED/DER
Behavioral
Lead sponsor
University of Hawaii
Other
Eligibility
35 Years to 69 Years
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Apr 3, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Flourish Vaginal Care System to Establish Neovaginal Microbiome

NCT05372770
View directory record Official record
Conditions
Neovaginal Microbiome
Interventions
Flourish Vaginal Care system
Device
Lead sponsor
Vaginal Biome Science
Other
Eligibility
18 Years and older
Enrollment
56 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
New Hope, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 1, 2025 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Denver Garden Environment and Microbiome Study Disease

NCT03089151
View directory record Official record
Conditions
Diet Modification, Physical Activity, Weight Gain, Chronic Disease, Lifestyle, Sedentary, Health Behavior
Interventions
Community Garden Intervention
Behavioral
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated May 7, 2021 · Synced Oct 20, 2026, 9:23 AM EDT
Recruiting No phase listed Observational

Impact of Gut Microbiome on Metabolic and Bowel Function During the First Year After Spinal Cord Injury

NCT05670288
View directory record Official record
Conditions
Spinal Cord Injuries, Gut Microbiome
Interventions
Not listed
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 85 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Dec 17, 2025 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional

A Study of Protein Metabolism, Microbiome and Investigational Probiotic Use in Patients With ALS

NCT03324399
View directory record Official record
Conditions
Amyotrophic Lateral Sclerosis, ALS
Interventions
probiotic
Dietary Supplement
Lead sponsor
Avera McKennan Hospital & University Health Center
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated Jul 2, 2019 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional Results available

Microbial Basis of Systemic Malodor and "People Allergic To Me" Conditions

NCT03582826
View directory record Official record
Conditions
Nutritional and Metabolic Diseases
Interventions
Nutritional counselling, Stress-reduction counseling
Behavioral
Lead sponsor
Mebo Research, Inc.
Other
Eligibility
18 Years to 110 Years
Enrollment
125 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Jan 5, 2021 · Synced Oct 20, 2026, 9:23 AM EDT
Withdrawn No phase listed Observational

A Non-Interventional Pilot Study to Explore the Skin Microbes in Skin Cancer

NCT04099446
View directory record Official record
Conditions
Skin Cancer, Melanoma (Skin), Squamous Cell Carcinoma, Basal Cell Carcinoma, Microbiome
Interventions
Non-interventional
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Jun 5, 2025 · Synced Oct 20, 2026, 9:23 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Exploring the Effects of an Intravaginal Lactic Acid Gel on the Vaginal Microbiome

NCT05753813
View directory record Official record
Conditions
Bacterial Vaginosis, Vulvovaginal Candidiasis
Interventions
Phexxi
Drug
Lead sponsor
Queen's Medical Center
Other
Eligibility
18 Years to 54 Years · Female only
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Feb 20, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Maternal Gut Microbiome (MGM) Study of Diet, the Gut Microbiome and Preterm Birth

NCT02560246
View directory record Official record
Conditions
Preterm Birth
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
400 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mediterranean-like Unprocessed (CLEAN-MED) Diet Intervention Study of the Gut Microbiome of Healthy Adults

NCT05411120
View directory record Official record
Conditions
Diet Therapy
Interventions
Western Diet, CLEAN-MED
Other
Lead sponsor
National Institutes of Health Clinical Center (CC)
NIH
Eligibility
18 Years to 60 Years
Enrollment
160 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 6, 2026 · Synced Oct 20, 2026, 9:23 AM EDT
Completed Not applicable Interventional

Effect of an Antiseptic Solution on the Skin Microbiome

NCT05608382
View directory record Official record
Conditions
Skin Diseases, Infectious
Interventions
sterile Phosphate Buffer Saline, SGW13
Other
Lead sponsor
Center for Innovation and Research Organization
Network
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 8, 2022 · Synced Oct 20, 2026, 9:23 AM EDT
Not listed Not applicable Interventional

Gut Microbiome and p-Inulin in CKD - TarGut CKD Study

NCT03348592
View directory record Official record
Conditions
Chronic Kidney Diseases
Interventions
Oligofructose-enriched inulin (p-inulin), No treatment
Dietary Supplement · Other
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Nov 21, 2017 · Synced Oct 20, 2026, 9:23 AM EDT