Clinical trials
Intestinal Microbiome clinical trials
Below are recruiting intestinal microbiome clinical trials, each written for real people, not researchers. We’re tracking 16 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05821010RecruitingPhase 2
Synbiotics and fecal transplant for non-alcoholic liver inflammation
This Phase 2 study tests whether taking special gut-helping products (synbiotics) and/or a fecal microbiota transplant can improve non-alcoholic steatohepatitis (NASH), a type of liver inflammation. It may help by changing gut bacteria that may affect liver health, but you must meet specific safety and medical criteria.
Amsterdam, North HollandAges 18–75 - NCT04410003RecruitingPhase 1
Stool-sample capsules to study gut microbiome in unexplained atherosclerosis
This early-phase study tests whether taking stool-based capsules can change gut bacteria in people with severe atherosclerosis that can’t be explained by usual risk factors. Researchers also measure related metabolic (body chemistry) and microbiome (gut bacteria) changes to see how this approach might help.
London, OntarioAges 18 years+ - NCT07439718Recruiting
Nutrition drink study for healthy adults
This study tests how a special nutritional drink affects the tiny organisms living in your small intestine. You will take the drink and provide stool samples to help researchers understand gut health.
LausanneAges 18–60 - NCT03298334RecruitingPhase 1/Phase 2
Testing vaginal bacteria transfer to newborns after C-section
This study looks at whether they can safely place “healthy vaginal bacteria” from the mother into the newborn after a scheduled C-section, and whether it improves the baby’s health. It only enrolls certain mothers and babies based on infection testing and other health factors.
Falls Church, VirginiaAges birth–50 years - NCT06318507Recruiting
Gut Bacteria and Immunotherapy for Triple-Negative Breast Cancer
This study looks at how bacteria in your gut might affect the way your body responds to immunotherapy for triple-negative breast cancer. It focuses on women who are overweight or obese and are about to start treatment with pembrolizumab before surgery.
Baton Rouge, LouisianaAges 18 years+ - NCT06319755Recruiting
Gut bacteria after Whipple surgery
This study looks at gut bacteria in people who had Whipple surgery for pancreatic cancer and in healthy volunteers. It aims to understand how the microbiome changes after surgery.
Camperdown, New South WalesAges 18 years+ - NCT06793137RecruitingPhase 2
Antibiotics before surgery for advanced rectal cancer
This trial tests if taking antibiotics before standard treatment can improve outcomes for people with advanced rectal cancer that requires surgery.
São Paulo, São PauloAges 18 years+ - NCT07017946RecruitingPhase 1/Phase 2
Gut bacteria transplant for fast-progressing ALS
This trial tests whether a transplant of healthy gut bacteria (called a microbiome transplant) can slow down ALS in people whose disease is progressing rapidly. It aims to see if changing the gut environment can help with symptoms and quality of life.
Durham, North CarolinaAges 18 years+ - NCT06639126Enrolling by invitation
Thyme extract for functional gut issues
This trial tests whether a wild thyme extract can help with functional gastrointestinal disorders (common digestive problems without a clear cause). It focuses on the extract's anti-inflammatory and metabolism-related effects.
Granada, GranadaAges 18–75 - NCT06845527Recruiting
Gut bacteria testing in a clinic study
This study looks at people who visit a special gut bacteria clinic. It aims to learn more about their health by testing their gut bacteria as part of regular care.
Rome, RMAges 18 years+ - NCT07042438RecruitingPhase 2
Fecal transplant to improve CAR T therapy for lymphoma
This study tests whether a fecal transplant (transferring healthy gut bacteria) can improve outcomes for people with certain lymphomas who have taken strong antibiotics and are about to get CAR T-cell therapy (Yescarta). The goal is to see if rebuilding gut bacteria helps the treatment work better.
Duarte, CaliforniaAges 18 years+ - NCT05835206RecruitingPhase 2
Drug to reduce antibiotic-resistant gut bacteria
This Phase 2 study tests whether an investigational treatment can help clear or reduce antibiotic-resistant bacteria living in the gut. It may help prevent these germs from causing future infections by targeting specific resistant bacteria found on stool or rectal swabs.
Atlanta, GeorgiaAges 18 years+ - NCT07602920Recruiting
Understanding Gut Leakage in Dengue Fever
This study investigates whether dengue fever causes the intestinal lining to become leaky, allowing harmful substances to enter the bloodstream. Researchers compare blood markers in dengue patients and healthy volunteers to understand how this happens and why it might make dengue worse.
Chittagong, Chattogram DivisionAges 18 years+ - NCT06072976Recruiting
How feeding affects gut health in babies with bowel conditions
This study looks at whether breast milk or formula helps babies with certain bowel problems heal faster and reach full feeds sooner. It compares how different milk affects the bacteria in a baby's gut.
Seattle, WashingtonAges birth–55 years - NCT07453823Recruiting
Synbiotic for gut health in overweight adults
This trial tests a combination supplement (a synbiotic) to see if it can improve gut function and gut bacteria in middle-aged and older adults who are overweight and have constipation. If eligible, you take the supplement daily and report how your digestion feels.
Cork, BlackpoolAges 50–70 - NCT07471373Recruiting
Pesticides and infertility study in endometriosis
This study looks at how pesticides might affect fertility in women with endometriosis, focusing on stress markers and gut/genital bacteria. You will provide samples and answer questions so researchers can compare women with and without endometriosis.
SalouëlAges 18–43
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Common questions
- Are there clinical trials for intestinal microbiome?
- Yes. Clin2 currently lists 16 recruiting intestinal microbiome studies from the U.S. registry, each rewritten for real people, not researchers, so you can see what it’s testing and who it’s for.
- How do I know if I qualify for a intestinal microbiome trial?
- Each study lists its eligibility criteria — rules about age, diagnosis, and prior treatments. On every Clin2 trial page we explain these in words written for real people and offer a short, optional pre-screen for a fit read. The study team makes the final decision.
- Does it cost anything to join a intestinal microbiome trial?
- Using Clin2 is always free. Many trials cover the cost of the study treatment and related visits; some reimburse travel. The study team explains exactly what’s covered before you decide.
Related conditions
Clin2 helps you find and understand clinical trials and does not provide medical advice. Study data comes from ClinicalTrials.gov. Talk with your doctor about whether a specific trial is right for you.