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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Human Gut Microbiota Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Interactions of Human Gut Microbiota With Intestinal Sweet Taste Receptors

NCT03032640
View directory record Official record
Conditions
Obesity
Interventions
Oral Glucose Tolerance Test (OGTT), Assessment of dietary compliance, Stool sampling, Sodium Saccharin, Placebo, Lactisole
Other
Lead sponsor
AdventHealth Translational Research Institute
Other
Eligibility
18 Years to 45 Years
Enrollment
102 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Orlando, Florida
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Jul 22, 2026, 11:57 AM EDT
Not yet recruiting Phase 4 Interventional

Impact of Probiotics on Gut Microbiome During Antibiotic Prophylaxis in Elective Orthopedic Surgery

NCT06791993
View directory record Official record
Conditions
Dysbiosis, Gut -microbiota, Microbiome Analysis, Probiotic, Antibiotic Prophylaxis
Interventions
Placebo Capsule, Probiotic with Human Milk Oligosaccharides (HMO)
Drug · Dietary Supplement
Lead sponsor
Acibadem Maslak Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 23, 2025 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers

Effects of Xylooligosarcharide on Composition of the Human Colonic Microflora

NCT01861964
View directory record Official record
Conditions
Bifidobacteria, Healthy Volunteers
Interventions
Placebo (Maltodextrin), Xylooligosarcharide 1.4g, Xylooligosarcharide 2.8g
Dietary Supplement
Lead sponsor
University of California, Los Angeles
Other
Eligibility
20 Years to 50 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
2
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 27, 2016 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Microbiome Derived Metabolism and Pharmacokinetics

NCT05065671
View directory record Official record
Conditions
Microbial Colonization
Interventions
Tolcapone 100 MG, Duloxetine 20 MG
Drug
Lead sponsor
Rutgers, The State University of New Jersey
Other
Eligibility
18 Years to 65 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Somerville, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of a Dietary Fiber on Fecal Microbiota and Metabolism

NCT01518088
View directory record Official record
Conditions
Focus of the Study is on Gut Health
Interventions
Dietary Fiber
Dietary Supplement
Lead sponsor
Ingredion Incorporated
Industry
Eligibility
20 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Apr 20, 2016 · Synced Jul 22, 2026, 11:57 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 Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Results available

Impacts of Lentils on Metabolism and Inflammation

NCT04283448
View directory record Official record
Conditions
Hypertriglyceridemia, Inflammation, Waist, Hypertriglyceridemic
Interventions
Dietary Lentil, Control
Behavioral
Lead sponsor
Montana State University
Other
Eligibility
18 Years to 70 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated Dec 12, 2024 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Human Gut Microbiota and Prebiotic Response

NCT03595306
View directory record Official record
Conditions
Healthy Gut Microbiota
Interventions
Prebiotic A - inulin, Prebiotic B - galactooligosaccharides(GOS), Prebiotic C - wheat dextrin
Dietary Supplement
Lead sponsor
Duke University
Other
Eligibility
17 Years to 70 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 2, 2019 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Cognitive Ageing Nutrition and Neurogenesis (CANN) Trial

NCT02525198
View directory record Official record
Conditions
Mild Cognitive Impairment, Subjective Memory Impairment
Interventions
fatty acid/flavonoid blend, Placebo
Dietary Supplement
Lead sponsor
University of East Anglia
Other
Eligibility
55 Years and older
Enrollment
259 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2018
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated May 13, 2024 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of S. Boulardii and Amoxicillin/Clavulanate on Gut Microbiota

NCT01473368
View directory record Official record
Conditions
Healthy Volunteers
Interventions
Saccharomyces boulardii, Amoxicillin Clavulanate
Dietary Supplement · Drug
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Choline Source, Gut Microbiota and Trimethylamine-N-oxide Response

NCT04255368
View directory record Official record
Conditions
Metabolism
Interventions
Water-soluble choline, Fat-soluble choline, No choline control
Other
Lead sponsor
Utah State University
Other
Eligibility
21 Years to 50 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2020
U.S. locations
1
States / cities
Logan, Utah
Source: ClinicalTrials.gov public record
Updated Nov 3, 2020 · Synced Jul 22, 2026, 11:57 AM 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 24, 2023 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Longitudinal Study of the Human Intestinal Microbiome

NCT00832286
View directory record Official record
Conditions
Dysbacteriosis
Interventions
Ciprofloxacin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 28, 2021 · Synced Jul 22, 2026, 11:57 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 Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study to Evaluate the Influence of Diet on GI Health

NCT04783142
View directory record Official record
Conditions
Healthy
Interventions
High-fiber, low-protein diet, Low-fiber, high-protein diet
Other
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated May 14, 2023 · Synced Jul 22, 2026, 11:57 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Role of Dietary Titanium Dioxide on the Human Gut Microbiome and Health

NCT05864352
View directory record Official record
Conditions
Inflammation, Microbiota, Gastrointestinal Irritation
Interventions
Not listed
Lead sponsor
University of Massachusetts, Lowell
Other
Eligibility
18 Years to 30 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Lowell, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 6, 2024 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

What's Hopping? Cricket Protein and Human Gut Microbiota

NCT03383341
View directory record Official record
Conditions
Healthy
Interventions
Cricket Protein Powder, Placebo control
Dietary Supplement · Other
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 3, 2019 · Synced Jul 22, 2026, 11:57 AM EDT
Active, not recruiting 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 Jul 22, 2026, 11:57 AM 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 18, 2017 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Predicting Adenomatous Polyps in the Colon Using Images of a Human Tongue

NCT06305364
View directory record Official record
Conditions
Colorectal Neoplasms, Gastrointestinal Microbiome
Interventions
Gixam
Device
Lead sponsor
Jubaan Ltd.
Industry
Eligibility
18 Years to 75 Years
Enrollment
426 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
3
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 19, 2025 · Synced Jul 22, 2026, 11:57 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 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Almond Consumption on the Human Gastrointestinal Microbiota and Metabolic Health

NCT04223323
View directory record Official record
Conditions
Overweight and Obesity
Interventions
Almonds, Pretzels
Dietary Supplement
Lead sponsor
University of Illinois at Urbana-Champaign
Other
Eligibility
30 Years to 60 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2023
U.S. locations
1
States / cities
Urbana, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Systems Biology of Flu Vaccine in Healthy Adults With and Without the Use of Antibiotics

NCT02154061
View directory record Official record
Conditions
Influenza
Interventions
IIV Flu Vaccine, Metronidazole, Neomycin, Vancomycin
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 40 Years
Enrollment
33 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Aug 14, 2018 · Synced Jul 22, 2026, 11:57 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Impact of Aronia Berry Consumption on Inflammation, Metabolites, and the Gut Microbiome

NCT05255718
View directory record Official record
Conditions
Inflammation, Metabolic Disorder, Hypertriglyceridemia
Interventions
Aronia juice, Placebo
Dietary Supplement · Other
Lead sponsor
Montana State University
Other
Eligibility
18 Years to 60 Years
Enrollment
13 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019
U.S. locations
1
States / cities
Bozeman, Montana
Source: ClinicalTrials.gov public record
Updated Mar 12, 2024 · Synced Jul 22, 2026, 11:57 AM EDT