Independent directory Public ClinicalTrials.gov records United States
Clear filters
ClinicalTrials.gov public records Last synced Sep 4, 2026, 7:43 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effects of Gastric Acid on Colonic Microbiome

NCT01901276
Conditions
Clostridium Difficile
Interventions
Omeprazole 40 mg bid
Drug
Lead sponsor
Daniel Freedberg, MD
Other
Eligibility
18 Years and older · Male only
Enrollment
14 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Enrolling by invitation Phase 1 Interventional

Fecal Microbiome Transplant

NCT02636517
Conditions
Clostridium Difficile, Inflammatory Bowel Disease, Crohn's Disease, Ulcerative Colitis
Interventions
Fecal Microbiota Transplant
Biological
Lead sponsor
Judith Kelsen
Other
Eligibility
3 Years to 21 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2027
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Terminated Not applicable Interventional Accepts healthy volunteers

Microbiome and Axial Spondyloarthritis

NCT04713995
Conditions
Axial Spondyloarthritis
Interventions
Dietary recommendations
Other
Lead sponsor
Viome
Industry
Eligibility
18 Years and older
Enrollment
95 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
Bothell, Washington
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Biometabolic Outcomes After Weight Loss Surgery: An Individualized Approach

NCT04841057
Conditions
Obesity, Morbid, Metabolic Syndrome, NASH - Nonalcoholic Steatohepatitis
Interventions
50 cm BP limb length, 100 cm BP limb length, 150 cm BP limb length
Procedure
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years to 80 Years
Enrollment
750 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2031
U.S. locations
1
States / cities
Columbia, Missouri
Recruiting Phase 1Phase 2 Interventional

Vaginal Microbiota Transplant

NCT04046900
Conditions
Recurrent Bacterial Vaginosis
Interventions
Vaginal microbiome transplant, Oral Metronidazole, Sterile saline
Biological · Drug · Other
Lead sponsor
Douglas Kwon
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Conditions
Multiple Myeloma, Acute Myeloid Leukemia, Acute Lymphoblastic Leukemia, Non Hodgkin Lymphoma, Acute Lymphocytic Leukemia, Hodgkin Lymphoma, Hodgkin Disease, Myelofibrosis, Myelodysplastic Syndromes, Myeloproliferative Neoplasm, Sickle Cell Disease, Mantle Cell Lymphoma
Interventions
Pre-biotic foods/drinks
Other
Lead sponsor
University of Virginia
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Charlottesville, Virginia
Completed No phase listed Observational Accepts healthy volunteers

Oral Microbiome and Pancreatic Cancer

NCT03302637
Conditions
Pancreatic Cancer
Interventions
16S rRNA gene sequencing assay
Other
Lead sponsor
NYU Langone Health
Other
Eligibility
55 Years to 74 Years
Enrollment
732 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2010
U.S. locations
1
States / cities
New York, New York
Completed Not applicable Interventional Accepts healthy volunteers

Tart Cherry Supplementation & Gut Microbiome and Inflammation

NCT04467372
Conditions
Inflammation, Glucose Regulation, Sleep
Interventions
Tart cherry juice concentrate, Juice placebo, Freeze dried tart cherry powder, Capsule placebo
Dietary Supplement
Lead sponsor
Ohio University
Other
Eligibility
18 Years to 55 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Athens, Ohio
Conditions
Arterial Stiffness, Blood Pressure, Dysbiosis, Inflammation, Permeability; Increased
Interventions
Freeze-dried grape powder, Placebo powder
Dietary Supplement · Other
Lead sponsor
University of California, Davis
Other
Eligibility
45 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Davis, California
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
Conditions
Skin Pigmentation
Interventions
Almond Oil, Hydroquinone Topical
Other · Drug
Lead sponsor
University of California, Davis
Other
Eligibility
18 Years and older · Female only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Sacramento, California
Completed Not applicable Interventional Accepts healthy volunteers

Assessing the Dose Response of a Lead Fiber Snack Prototype

NCT04729816
Conditions
Microbiota, Gastrointestinal Microbiome
Interventions
Controlled, high fat/low fiber diet background diet, sequentially supplemented with an escalating dose of a fiber-blend snack food.
Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 60 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
St Louis, Missouri
Conditions
Adenocarcinoma of the Prostate
Interventions
Cyclophosphamide, DRibble Vaccine, HPV Vaccinations, Imiquimod
Drug · Biological
Lead sponsor
UbiVac
Industry
Eligibility
Male only
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Portland, Oregon
Not yet recruiting Not applicable Interventional

Fermented Foods and Bowel Health in SCI

NCT07640152
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
Completed Not applicable Interventional Accepts healthy volunteers

Microbiota Diversity and Composition and Polyphenol Bioavailability

NCT02677649
Conditions
Fecal Microbiota
Interventions
cranberry, placebo
Other
Lead sponsor
Tufts University
Other
Eligibility
20 Years to 55 Years
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Boston, Massachusetts
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
Active, not recruiting No phase listed Observational Accepts healthy volunteers

My Baby Biome: Infant Stool Samples for Microbiome Health (MBB)

NCT05472688
Conditions
Dysbiosis
Interventions
Not listed
Lead sponsor
Persephone Biosciences
Industry
Eligibility
0 Months to 2 Months
Enrollment
430 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2029
U.S. locations
1
States / cities
San Diego, California
Completed Not applicable Interventional Accepts healthy volunteers

Study to Determine the Effect of Synbiotics in Patients With Pre-diabetes

NCT04428606
Conditions
PreDiabetes
Interventions
Metabolic Rheostat, Butyrate Ultra, Placebo
Dietary Supplement
Lead sponsor
Zhaoping Li
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Los Angeles, California
Recruiting Not applicable Interventional Accepts healthy volunteers

Effects of Mouthrinse on the Microbiome of the Oral Cavity and GI Tract

NCT05603650
Conditions
Oral Bacterial Infection, Oral Infection, Microbial Colonization, Viral Infection
Interventions
Lumineux Oral Essentials rinse, Listerine rinse
Other
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Irvine, California
Completed Not applicable Interventional Accepts healthy volunteers

Elderberry Consumption and Human Health

NCT06626373
Conditions
Obesity, Unspecified
Interventions
Elderberry Juice, Placebo Beverage
Other
Lead sponsor
Washington State University
Other
Eligibility
22 Years to 75 Years
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Spokane, Washington
Conditions
Covid19
Interventions
Not listed
Lead sponsor
The University of Texas Medical Branch, Galveston
Other
Eligibility
18 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Galveston, Texas
Not listed Not applicable Interventional Accepts healthy volunteers

The Effects of an Oral Hair Supplement on Hair Density, Growth, and Microbiome

NCT06146166
Conditions
Hair Thinning
Interventions
Oral herbal supplement, Oral placebo supplement
Dietary Supplement
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
25 Years to 65 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Sacramento, California
Conditions
Early Cirrhosis
Interventions
KB174, Maltodextrin
Other
Lead sponsor
Kaleido Biosciences
Industry
Eligibility
18 Years to 70 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
4
States / cities
Hollywood, Florida • Miami, Florida • Winter Park, Florida + 1 more
Conditions
Lung Cancer, Cancer, Malignancy
Interventions
Nasal Swab, Oral Swab, Stool Collection, Microbiome analysis, DNA Banking, Skin Swab
Procedure · Other · Genetic
Lead sponsor
Taher Abu Hejleh
Other
Eligibility
18 Years to 100 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
1
States / cities
Iowa City, Iowa