Gut Microbiome Clinical Trials

36 recruitingLast updated: June 18, 2026

There are 36 actively recruiting gut microbiome clinical trials across 15 countries. Studies span Not Applicable, Phase 2, Phase 4, Phase 1. Top locations include Chicago, Illinois, United States, New York, New York, United States, Phoenix, Arizona, United States. Updated daily from ClinicalTrials.gov.


Gut Microbiome Trials at a Glance

36 actively recruiting trials for gut microbiome are listed on ClinicalTrialsFinder across 6 cities in 15 countries. The largest study group is Not Applicable with 19 trials, with the heaviest enrollment activity in Chicago, New York, and Phoenix. Lead sponsors running gut microbiome studies include Aga Khan University, American Gastroenterological Association, and Academisch Medisch Centrum - Universiteit van Amsterdam (AMC-UvA).

Browse gut microbiome trials by phase

Treatments under study

About Gut Microbiome Clinical Trials

Looking for clinical trials for Gut Microbiome? There are currently 35 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 Gut 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 Gut 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 120 of 36 trials

Recruiting

Sex-differential Host-microbiome CVD Risk - A Longitudinal Cohort Approach

Immune SystemGut MicrobiomeTransgender+1 more
Charite University, Berlin, Germany200 enrolled1 locationNCT05334888
Recruiting

AGEWISE: Unravelling the Gut-Hormone Axis in Women's Ageing

MenopauseGut MicrobiomeChronic Low-Grade Inflammation+2 more
Gulbenkian Institute for Molecular Medicine300 enrolled1 locationNCT07614542
Recruiting
Not Applicable

Effect of a Food Intervention With a Prebiotic Alone or Combined With B-vitamins on Gut Microbiota Diversity, Inflammation and Mental Health Outcomes in Older Adults (GutFood)

Biomarkers of B-vitamin Status and Gut Microbiome Composition
University of Ulster84 enrolled1 locationNCT07592975
Recruiting
Phase 4

Understanding the Efficacy of Dietary Supplement on Fungal Mycobiota in Healthy Volunteers: A Pilot Study

Gut healthGut MicrobiomeDietary Supplement+2 more
Weill Medical College of Cornell University20 enrolled1 locationNCT06433310
Recruiting
Not Applicable

Goat Milk-Derived Formula vs. Undiluted Goat Milk in Infants Unable to Exclusively Breastfeed: Growth and Biomarker Analysis

Gut MicrobiomeLipidomicsMalnutrition (Calorie)+2 more
Aga Khan University15 enrolled1 locationNCT07225153
Recruiting
Not Applicable

Wild Blueberries for Gut, Brain, and Heart Health in Adults With High Blood Pressure

Arterial StiffnessAdultOverweight+13 more
Georgia State University40 enrolled1 locationNCT06735599
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

Impact of Training Load on the Gut miCrobiome And Its Relation to exeRcise Performance, mUscle Phenotype, and markerS of Overreaching in Healthy Men

Exercise performanceMetabolic HealthExercise+12 more
Stefan De Smet45 enrolled1 locationNCT07481578
Recruiting
Not Applicable

Flourish: Exploring the Early Infant Gut Microbiome

MicrobiotaMicrobiomeGut Microbiome+1 more
Seeding Inc250 enrolled1 locationNCT07333482
Recruiting
Not Applicable

Effects of Mango or Low-Fat Cookie Consumption on Gut Health, and Its Relationship With Mental, Sexual and Skin Health

Gut Microbiome
San Diego State University60 enrolled1 locationNCT06800833
Recruiting

Fecal Microbiota Transplant National Registry

Fecal Microbiota TransplantationGut MicrobiomeClostridium Difficile Infection
American Gastroenterological Association4,000 enrolled53 locationsNCT03325855
Recruiting
Phase 1Phase 2

Curcumin and Retinal Study

SafetyGut MicrobiomeBioavailability
Texas Tech University Health Sciences Center60 enrolled1 locationNCT05774704
Recruiting

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

Gut MicrobiomeSpinal Cord Injuries
University of Alabama at Birmingham35 enrolled1 locationNCT05670288
Recruiting

Antimicrobial Combination Therapy for Treatment of Enterococcus Faecalis Bacteremia

Blood Stream InfectionGut MicrobiomesEnterococcus Faecalis Infection
IRCCS Azienda Ospedaliero-Universitaria di Bologna510 enrolled4 locationsNCT06833593
Recruiting
Not Applicable

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

Body CompositionGut MicrobiomeFeasibility Studies+8 more
University of Nevada, Las Vegas30 enrolled1 locationNCT07082348
Recruiting

Impact of Transcatheter Aortic Valve Implantation (TAVI) on the Gut Microbiota in Patients With Aortic Valve Stenosis

Gut MicrobiomeTAVIGut Microbiota+2 more
Hippocration General Hospital40 enrolled1 locationNCT07052071
Recruiting
Not Applicable

Enhanced Nutritional Optimization in LVAD Trial

Heart FailureGut MicrobiomeNutritional Deficiency
Columbia University50 enrolled1 locationNCT05655910
Recruiting
Not Applicable

Early Avocado Exposure on Development and the Gut Microbiome in American Hispanic Infants

Gut MicrobiomeInfant GrowthNeurocognitive Correlates of Eating Habits
Arizona State University150 enrolled1 locationNCT06876935
Recruiting
Not Applicable

The Effect Cranberry-Based Products on the Female Microbiome

Gut healthGut MicrobiomeVaginal Microbiome
Ocean Spray Cranberries, Inc.60 enrolled1 locationNCT07109713
Recruiting
Not Applicable

How a Single Workout Affects Gut Bugs in Women With Different Fitness Levels and Body Types

ExerciseObesityWeight Management+5 more
George Washington University40 enrolled1 locationNCT06691100