Intestinal microbiome Clinical Trials

17 recruitingLast updated: May 29, 2026

There are 17 actively recruiting intestinal microbiome clinical trials across 8 countries. Studies span Not Applicable, Phase 2, Phase 1, Early Phase 1. Top locations include Aurora, Colorado, United States, Boston, Massachusetts, United States, Copenhagen, DK, Denmark. Updated daily from ClinicalTrials.gov.


Intestinal microbiome Trials at a Glance

17 actively recruiting trials for intestinal microbiome are listed on ClinicalTrialsFinder across 6 cities in 8 countries. The largest study group is Not Applicable with 6 trials, with the heaviest enrollment activity in Aurora, Boston, and Copenhagen. Lead sponsors running intestinal microbiome studies include Nutrition Research Australia, Chr Hansen - part of Novonesis, and Athletic Greens International.

Browse intestinal microbiome trials by phase

Treatments under study

About Intestinal microbiome Clinical Trials

Looking for clinical trials for Intestinal microbiome? There are currently 4 studies actively recruiting participants. Clinical trials offer access to new treatments before they are widely available, and every approved therapy in use today was first tested through a clinical trial.

Below you can browse trials, sign up for alerts when new Intestinal microbiome trials open, and view eligibility criteria for each study. Each listing includes the study phase, locations, and enrollment details.

Frequently Asked Questions

Common questions about Intestinal microbiome clinical trials

A clinical trial is a carefully designed research study that tests new medical treatments, drugs, devices, or approaches in human volunteers. Every approved medication and treatment available today was proven safe and effective through clinical trials.

All clinical trials are reviewed and approved by Institutional Review Boards (IRBs) — independent committees that evaluate patient safety. Trials follow strict protocols, and your health is monitored closely throughout. You can withdraw at any time.

Not necessarily. Many trials compare the new treatment against the current standard of care, meaning all participants receive active treatment. When placebos are used, they are typically combined with standard treatment, not given alone. The trial description will always specify the design.

Under the Affordable Care Act, most private insurers are required to cover routine patient care costs during a clinical trial. The sponsor typically covers the investigational treatment itself. Medicare also covers routine costs for qualifying trials.

Yes. Participation is completely voluntary. You can withdraw at any time, for any reason, without it affecting your access to standard medical care.

Each trial has specific eligibility criteria — including age, diagnosis, disease stage, prior treatments, and general health. Browse the trials listed above and check their eligibility sections. You can also contact the trial site directly to discuss your situation.

Showing 117 of 17 trials

Recruiting
Phase 1Phase 2

COffee and Metabolites Modulating the Gut MicrobiomE in Colorectal caNCER

Colorectal, CancerStenosisFibrosis, Liver+4 more
Massachusetts General Hospital80 enrolled1 locationNCT05692024
Recruiting
Not Applicable

Smart Underwear to Measure Diet-Induced Hydrogen Sulfide Production

Gastrointestinal MicrobiomeHydrogen Sulfide
University of Colorado, Denver25 enrolled1 locationNCT06802276
Recruiting
Not Applicable

The Effect of a Synbiotic on Intestinal Barrier Function and Microbiota Modulation in Middle-aged to Elderly Individuals With Excessive Body Weight

Gastrointestinal SymptomsGastrointestinal Microbiome (Focus)
Chr Hansen - part of Novonesis90 enrolled1 locationNCT07453823
Recruiting

Observational Study of Gut Microbiota in Abemaciclib-Treated Patients With and Without Diarrhea

Breast NeoplasmsAbemaciclibHormone Receptor-Positive Breast Cancer+4 more
Hubei Cancer Hospital60 enrolled1 locationNCT07264998
Recruiting
Not Applicable

Microbiome and Diet in Parkinson's Disease

Diet, HealthyParkinson DiseaseGut Microbiome+1 more
University of British Columbia40 enrolled1 locationNCT06207136
Recruiting
Not Applicable

A Randomized, Triple-blind, Placebo-controlled Study to Evaluate the Effects of a Supplement on Nutrient Gaps and Gut Health Among Individuals Utilizing GLP-1 RAs

nutrition statusGastrointestinal MicrobiomeGLP - 1+1 more
Athletic Greens International120 enrolled1 locationNCT07437911
Recruiting

Clinical Characteristics of Sleep Disorders in Patients With Ulcerative Colitis

Sleep QualityGastrointestinal MicrobiomeColitis Ulcerative+1 more
Xijing Hospital152 enrolled1 locationNCT06359808
Recruiting
Early Phase 1

Influence of Short-Term Antibiotic Therapy on Exercise

ExerciseGastrointestinal Microbiome
Rutgers, The State University of New Jersey40 enrolled2 locationsNCT05961189
Recruiting
Phase 1Phase 2

Vaginal Microbiome Seeding and Health Outcomes in Cesarean-delivered Neonates.

Intestinal microbiomeMicrobiotaGastrointestinal Microbiome+3 more
National Institute of Allergy and Infectious Diseases (NIAID)600 enrolled1 locationNCT03298334
Recruiting

A Study to Explore the Role of Gut Flora in COVID-19 Infection

CoronavirusCOVID-19Gut Microbiome+5 more
ProgenaBiome250 enrolled1 locationNCT04359836
Recruiting
Not Applicable

Biomarkers in Immunotherapy of Melanoma

Metastatic MelanomaImmune Checkpoints InhibitorsGastrointestinal Microbiome (Bacterial and Viral)+1 more
Institute of Oncology Ljubljana150 enrolled1 locationNCT05878977
Recruiting
Phase 1

Metabolic and Metagenomic Effects of Intestinal Microbiome Repopulation in Unexplained Atherosclerosis

Intestinal microbiomeAtherosclerosis
Western University, Canada100 enrolled1 locationNCT04410003
Recruiting
Phase 2

Synbiotics and Fecal Microbiota Transplantation to Treat Non-Alcoholic Steatohepatitis

Intestinal microbiomeNon-Alcoholic Fatty Liver DiseaseNon Alcoholic Steatohepatitis+6 more
Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA)48 enrolled1 locationNCT05821010
Recruiting
Phase 2

Efficacy and Safety of Fecal Microbiota Transplantation (FMT) in Reducing Recurrence of Colorectal Adenoma (CRA)

Colorectal AdenomaFecal Microbiota TransplantationGastrointestinal Microbiome
Shenzhen Hospital of Southern Medical University466 enrolled5 locationsNCT06205862
Recruiting

Australian Immunity Trial (Trial B): The effect of milk proteins on immune function in healthy young adults

Immune FunctionCognitionGastrointestinal Microbiome
Nutrition Research Australia50 enrolled1 locationACTRN12622000757718
Recruiting

Australian Immunity Trial (Trial A): The effect of milk proteins on immune function in healthy young adults

Immune FunctionCognitionGastrointestinal Microbiome
Nutrition Research Australia50 enrolled1 locationACTRN12622000755730
Recruiting
Not Applicable

Cancer-associated Muscle Mass - Molecular Factors and Exercise Mechanisms

ExerciseBody CompositionSarcopenia+15 more
University of Copenhagen144 enrolled1 locationNCT05307367