Gut Microbiota Clinical Trials

37 recruitingLast updated: June 18, 2026

There are 37 actively recruiting gut microbiota clinical trials across 16 countries. Studies span Not Applicable, Phase 2, Phase 3. Top locations include Québec, Quebec, Canada, Taichung, Wuqi District, Taiwan, Atlanta, Georgia, United States. Updated daily from ClinicalTrials.gov.


Gut Microbiota Trials at a Glance

37 actively recruiting trials for gut microbiota are listed on ClinicalTrialsFinder across 6 cities in 16 countries. The largest study group is Not Applicable with 24 trials, with the heaviest enrollment activity in Québec, Taichung, and Atlanta. Lead sponsors running gut microbiota studies include Georgia State University, Laval University, and Tungs' Taichung Metroharbour Hospital.

Browse gut microbiota trials by phase

Treatments under study

About Gut Microbiota Clinical Trials

Looking for clinical trials for Gut Microbiota? There are currently 31 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 Microbiota 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 Microbiota 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 37 trials

Recruiting
Not Applicable

Modulation of Gut Microbiota Composition and Gut Permeability Profiles by Multispecies Synbiotic Supplementation in Hemodialysis Patients

HemodialysisGut MicrobiotaUremic Toxins+2 more
Tungs' Taichung Metroharbour Hospital30 enrolled1 locationNCT07461233
Recruiting
Not Applicable

Alterations of Gut Derived Uremic Toxins and Microbiome Metabolites by Multispecies Synbiotic

Gut MicrobiotaUremic ToxinsSymbiotic
Tungs' Taichung Metroharbour Hospital30 enrolled1 locationNCT07443280
Recruiting
Not Applicable

Developing Precision Microbiota-Based Cocktail Modification Therapy to Delay the Progression of Parkinson's Disease (PD) - Use Preclinical Human Trials to Confirm the Impact of the Optimal "Probiotic Y7, Tryptophan and Branched-chain Amino Acid" Cocktail Formula on Early Stage PD Patients

Gut MicrobiotaParkinson Disease (PD)Probiotic
Taipei Medical University120 enrolled1 locationNCT07619560
Recruiting
Not Applicable

Organoid Models of Hepatocellular Carcinoma

SurgeryHepatocellular CarcinomaOrganoids+3 more
Fondazione Policlinico Universitario Agostino Gemelli IRCCS150 enrolled1 locationNCT06929845
Recruiting
Phase 2Phase 3

Virtual Menstrual Pain Approaches in Females

Digital HealthAcupressureMetabolomics+5 more
Nanyang Technological University145 enrolled1 locationNCT07497711
Recruiting
Not Applicable

Impact of a Novel Functional Snack on Perimenopausal Symptoms and Well-being

Quality of LifeSleepGut Microbiota+3 more
King's College London20 enrolled1 locationNCT07599930
Recruiting
Not Applicable

Pesticides and Infertility: Oxidative Stress Via Circulating Cell-free DNA and Gut/Genital Microbiome Signatures in Women With Endometriosis

InfertilityEndometriosisEpigenetics+7 more
Centre Hospitalier Universitaire, Amiens160 enrolled1 locationNCT07471373
Recruiting
Not Applicable

Effect of Dairy Protein Yogourt vs Plant-based Yogourt on Body Weight, Body Composition, Bone Health and Gut Microbiota

bone metabolismMetabolic HealthGut Microbiota+3 more
Laval University75 enrolled1 locationNCT07578103
Recruiting
Not Applicable

Sustainable and Inclusive Use of Alternative Proteins in Mediterranean Supply Chains (CIPROMED)

Gut MicrobiotaOverweight (BMI > 25)Food Preferences+2 more
University of Bologna40 enrolled1 locationNCT07553936
Recruiting
Not Applicable

Effects Of Dietary Fats on Gut Microbiota Composition and Metabolic Activity in Healthy Adults

Inflammation BiomarkersGut Microbiota Diversity and CompositionShort Chain Fatty Acids Concentration in Stools+1 more
University of Glasgow64 enrolled1 locationNCT07550023
Recruiting
Not Applicable

MiCrobiota-gut-brain Axis in Resistant Epilepsy

EpilepsyDrug Resistant EpilepsyGut Microbiota
Niguarda Hospital120 enrolled1 locationNCT07010445
Recruiting
Not Applicable

Peanuts for Cardiometabolic, Brain, and Intestinal Health

AdultPrediabetesCognition+5 more
Georgia State University72 enrolled1 locationNCT06867198
Recruiting
Not Applicable

Wild Blueberries for Gut, Brain, and Cardiometabolic Health in Prediabetes

Arterial StiffnessBody CompositionAdult+9 more
Georgia State University30 enrolled1 locationNCT06735651
Recruiting
Not Applicable

Effects of Akkermansia Muciniphila and Berberine Supplementation on Insulin Sensitivity in Night-shift Workers

Obesity, OverweightPrediabetes (Insulin Resistance, Impaired Glucose Tolerance)Circadian Rhythm Disorders+1 more
FH Joanneum Gesellschaft mbH200 enrolled1 locationNCT07440147
Recruiting
Not Applicable

Lifestyle Interventions to Prevent Cognitive Deficits in Subjects With Depressive Symptoms: From Mechanisms to Clinical Practice

Physical ActivityDepressive SymptomsInflammation+3 more
IRCCS Centro San Giovanni di Dio Fatebenefratelli120 enrolled1 locationNCT07009223
Recruiting

The Efficacy of PD-1 Monoclonal Antibody Combined With Chemotherapy in Metastatic Gastric Cancer Based on Gut Microbiota

Gastric CancerGut Microbiota
Fudan University300 enrolled1 locationNCT07400354
Recruiting
Not Applicable

The Effect of Vitamin C Supplementation on Gut Microbiota Composition and Function in Healthy Adults

Gut Microbiota Diversity and CompositionShort Chain Fatty Acids Concentration in Stools
University of Glasgow23 enrolled1 locationNCT07388121
Recruiting

Monitoring the Clinical and Immunological Effects of Microbiome Changes Following Severe Burn Injury

Severely Burned PatientsGut Microbiota Diversity and CompositionInflammatory Responses
Tamas Vegh, MD30 enrolled1 locationNCT07329595
Recruiting

SMASH: Study to Evaluate the Clinical Efficacy of an Extensively Hydrolysed Infant Formula With Synbiotics and a Human Milk Oligosaccharide (HMO) in Infants With Cow's Milk Protein Allergy (CMPA)

Gut MicrobiotaFood HypersensitivityCow's Milk Protein Allergy (CMPA)+1 more
Outcomes'1041 enrolled13 locationsNCT07342621
Recruiting
Not Applicable

A Study on the Modulation of Gut Microbiota by Oral Sialic Acid in Healthy Subjects

HealthyTaking Sialic Acid to Regulate the Gut Microbiota
Xiaolong Li42 enrolled1 locationNCT07162662