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Showing 1–24 of 92 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Human Microbiome Clear all
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 Jun 28, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

Exploratory Study of Circadian Relationships Between Social Behavior, Blood Pressure and Metabolomics

NCT02249793
View directory record Official record
Conditions
Healthy
Interventions
Not listed
Lead sponsor
University of Pennsylvania
Other
Eligibility
25 Years to 35 Years
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Pediatric Obesity and the Infant Microbiome (BEACH)

NCT02843087
View directory record Official record
Conditions
Pediatric Obesity
Interventions
Not listed
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
83 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2024
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Sep 3, 2026, 1:18 AM EDT
Recruiting No phase listed Observational

Optimizing Nutrition and Milk (Opti-NuM) Project

NCT06870981
View directory record Official record
Conditions
Very Low Birth Weight Baby, Early Nutrition and the Preterm Infant, Nutritional Requirements, Human Milk Fortification, Human Milk Microbiome, Human Milk Feeding, Human Milk Nutrition, Growth &Amp; Development
Interventions
Opti-NuM is an observational secondary use of data/samples study, the investigators will analyze information and specimens from the MaxiMoM platform RCTs. No interventions form part of this study.
Other
Lead sponsor
The Hospital for Sick Children
Other
Eligibility
1 Hour to 21 Days
Enrollment
1,100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2027
U.S. locations
2
States / cities
Palo Alto, California • San Diego, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 3, 2026, 1:18 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

Alternation in the Human Microbiome With Commonly Used Topical Medications

NCT03437005
View directory record Official record
Conditions
Healthy
Interventions
Desonide 0.05%, Ketoconazole 2%
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2026
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Feb 19, 2026 · Synced Sep 3, 2026, 1:18 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 Sep 3, 2026, 1:18 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effects of Natural Sugars in Breast Milk on Healthy Infant Growth and Development

NCT04434027
View directory record Official record
Conditions
Obesity
Interventions
Not listed
Lead sponsor
University of Southern California
Other
Eligibility
18 Years to 59 Years · Female only
Enrollment
221 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional

Combining HIIT and n-3 PUFA to Reduce Inflammation and Improve Metabolic Health

NCT05295719
View directory record Official record
Conditions
Obesity, Inflammation, Human Microbiome, Insulin Resistance, Dyslipidemias
Interventions
Omega-3 polyunsaturated fatty acid, High-Intensity Interval Training, Safflower oil, Low-intensity training
Dietary Supplement · Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
18 Years to 65 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 3, 2026, 1:18 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Pulses Consumption and Its Role in Managing Systemic Inflammation, Insulin Sensitivity and Gut Microbiome in Human

NCT04267705
View directory record Official record
Conditions
Insulin Sensitivity, Overweight or Obesity, Inflammatory Response
Interventions
Control, Black bean, Chickpea
Other
Lead sponsor
Clinical Nutrition Research Center, Illinois Institute of Technology
Industry
Eligibility
18 Years and older
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2027
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 3, 2026, 1:18 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 Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Antimicrobial-free Production of Beef Cattle's Affect on Gut Microbiome

NCT04023604
View directory record Official record
Conditions
Diet Modification
Interventions
Controlled diet with beef raised without antibiotics, Controlled diet with beef produced in conventional systems
Other
Lead sponsor
Purdue University
Other
Eligibility
21 Years to 69 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
West Lafayette, Indiana
Source: ClinicalTrials.gov public record
Updated Sep 27, 2022 · Synced Sep 3, 2026, 1:18 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

The Effects of Agro-ecological Farming Systems on Human Health

NCT05575258
View directory record Official record
Conditions
Inflammatory Response
Interventions
44-Day Diet Conventionally Sourced - YELLOW Diet, 44-Day Diet Agro-Ecologically Sourced - GREEN Diet
Other
Lead sponsor
Utah State University
Other
Eligibility
35 Years to 60 Years
Enrollment
34 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Logan, Utah
Source: ClinicalTrials.gov public record
Updated Jul 14, 2024 · Synced Sep 3, 2026, 1:18 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 Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Novel Food Product Containing Microbiota Accessible Carbohydrates on the Human Microbiome

NCT03058575
View directory record Official record
Conditions
Gut Microbiome
Interventions
Dietary MACs, Control
Dietary Supplement · Other
Lead sponsor
Access Business Group
Industry
Eligibility
40 Years to 60 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Jan 22, 2018 · Synced Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impacts of Fruit on the Gut Health and Human Health

NCT05063929
View directory record Official record
Conditions
Cardiometabolic Health, Healthy Aging, Cognition
Interventions
Fruit (2 cup eq), Fruit restriction (1/2 cup eq)
Other
Lead sponsor
San Diego State University
Other
Eligibility
30 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Jan 7, 2025 · Synced Sep 3, 2026, 1:18 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 Sep 3, 2026, 1:18 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Diet and Microbiome Longitudinal Monitoring With Food Intervention

NCT04758715
View directory record Official record
Conditions
Microbiome, Human, Gastrointestinal Tract
Interventions
Food provided from a commercial meal service provider for a week
Other
Lead sponsor
University of Nebraska Lincoln
Other
Eligibility
19 Years and older
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2030
U.S. locations
1
States / cities
Lincoln, Nebraska
Source: ClinicalTrials.gov public record
Updated May 6, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Diet Modulation of Bacterial Sulfur and Bile Acid Metabolism and Colon Cancer Risk

NCT03550885
View directory record Official record
Conditions
Colorectal Cancer
Interventions
High taurine and saturated fat diet, Low in taurine and saturated fat diet
Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
45 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 5, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Vaginal Estradiol vs Moisturizer to Improve Postmenopausal Vaginal Aging Symptoms and the Microbiome in Women Living With HIV

NCT07526948
View directory record Official record
Conditions
Menopausal Complaints, Vaginal Atrophy, Genitourinary Symptoms, HIV (Human Immunodeficiency Virus), Menopause Related Conditions, Vaginitis, Perimenopause
Interventions
Vaginal estradiol tablets, Vaginal moisturizer
Drug · Other
Lead sponsor
Albert Einstein College of Medicine
Other
Eligibility
40 Years to 70 Years · Female only
Enrollment
62 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 27, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

The Effect of Fruit/Vegetable Drinks on the Human Intestine

NCT02377063
View directory record Official record
Conditions
Intestinal Bacteria Flora Disturbance
Interventions
Pressed Juice
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
18 Years to 50 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Sep 8, 2019 · Synced Sep 3, 2026, 1:18 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 3, 2026, 1:18 AM EDT
Completed No phase listed Observational

Deciphering the Mechanisms Involved in Microbial Translocation Across the Spectrum of HCV Associated Liver Fibrosis

NCT02400216
View directory record Official record
Conditions
Cirrhosis
Interventions
dual cholate
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 3, 2026, 1:18 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Safety of Lactobacillus Rhamnosus GG Vs. Placebo in Elderly Subjects Receiving Trivalent Inactivated Influenza Vaccine

NCT01368029
View directory record Official record
Conditions
Healthy, Elderly
Interventions
Lactobacillus rhamnosus GG ATCC 53103 (LGG), Placebo
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
65 Years to 80 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 10, 2017 · Synced Sep 3, 2026, 1:18 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 Sep 3, 2026, 1:18 AM EDT