Clinical trials
Gut Microbiome clinical trials
Below are recruiting gut microbiome clinical trials, each written for real people, not researchers. We’re tracking 141 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT03325855Recruiting
Fecal transplant registry for patients and donors
This study is a national “registry” that collects information from people who get fecal microbiota transplant (a stool-based treatment) and from people who donate stool. It helps researchers understand who receives these treatments and how they do over time.
Phoenix, ArizonaAges Any age - NCT03819296RecruitingPhase 1
Fecal transplant to treat cancer immunotherapy bowel side effects
This early-phase study tests whether changing your gut bacteria with a fecal transplant can improve diarrhea or colitis caused by cancer immunotherapy. It may help people whose symptoms have not fully settled with standard treatments like steroids and other immune-blocking medicines.
Houston, TexasAges 18 years+ - NCT06869941Recruiting
How gut health and fat tissue are linked in the brain
This study looks at how the bacteria in your gut might affect your fat tissue and brain. You may be able to join if you are scheduled to have surgery to remove fat tissue and are willing to sign a consent form.
Girona, GironaAges 20 years+ - NCT06124833Recruiting
Gut and mouth microbiome study for Korean IBD patients and their family
This study looks at the bacteria in your gut and mouth to understand more about inflammatory bowel disease (IBD). It compares patients with their close family members who do not have IBD to see what might be different.
SeoulAges 13–85 - NCT07667049RecruitingPhase 1
Gut health study for preterm infants
This study looks at how the gut works in premature babies to better understand digestion and health. It may help improve care for newborns born early.
Baltimore, MarylandAges Up to 4 days - NCT07402226Recruiting
Diet study for bloating with scleroderma
This study tests whether a special diet can help reduce bloating and stomach discomfort in people with scleroderma (systemic sclerosis). You'll follow a specific meal plan to see if it improves your digestive symptoms.
Ann Arbor, MichiganAges 18 years+ - NCT07144826RecruitingEarly Phase 1
Probiotic for Gut and Vaginal Health in Ovarian Cancer Chemotherapy
This trial tests whether taking a probiotic supplement can help balance the bacteria in your gut and vagina while you undergo chemotherapy for advanced ovarian cancer. It aims to see if this could improve your treatment experience or outcomes.
Columbus, OhioAges 18 years+ - NCT06048614Recruiting
Saline enema for meconium blockage in premature babies
This trial tests if giving a saline enema helps premature babies with meconium blockage pass stool, start feeding, and improve gut and brain health. It may reduce complications and help babies grow better.
SingaporeAges 1 day–8 months - NCT03577327Recruiting
Study gut and skin germs in vitiligo progression
This study looks at differences in the gut and skin microbiome (the germs living in and on the body) in people with vitiligo and in people without vitiligo. It aims to understand what might be linked to how vitiligo spreads over time.
Chicago, IllinoisAges 18–89 - NCT07443280Recruiting
Gut health supplement study for dialysis patients
This trial tests whether a special blend of probiotics and prebiotics (called a synbiotic) can improve gut health and reduce harmful waste products in the blood for people on hemodialysis.
Taichung, Wuqi DistrictAges 18 years+ - NCT07799402Recruiting
How gut and brain health change with age
This study looks at how the bacteria in your gut are linked to brain health as you age. It includes people with normal memory, mild memory problems, or Alzheimer's disease, and aims to find ways to keep brains healthy as we get older.
Tampa, FloridaAges 18 years+ - 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+ - NCT07792980Recruiting
Study of gut bacteria in colon cancer surgery
This study uses AI to analyze gut bacteria (microbiome) in people with colon cancer before and after surgery, to see how it relates to the effectiveness of a treatment called MPRO. It may help improve recovery and outcomes.
Seoul, SeoulAges 20–80 - NCT07329595Recruiting
Tracking gut bacteria changes after severe burns
This study looks at how severe burns change the bacteria in your gut and your immune system. It will track these changes to better understand recovery and find new ways to help healing.
Debrecen, Hajdú-BiharAges 18–65 - NCT06606119Recruiting
Brain, bone marrow, and gut study after major injury
This study is looking at how the brain, bone marrow, and gut interact after a severe injury. It may help doctors understand how to better treat trauma patients.
Gainesville, FloridaAges 18–100 - NCT06519162Recruiting
Liver-gut link study for liver disease patients and their families
This study looks at how gut bacteria differ in people with specific liver diseases and their household contacts. It may help researchers understand the connection between the liver and gut.
Daejeon, Jung-guAges 19 years+ - NCT07195006Recruiting
Malnutrition in pregnancy and child growth study
This study looks at how nutrition during pregnancy affects the health of mothers and babies, including gut health and growth. It compares women with low nutrition to those with healthy nutrition.
HarareAges 18 years+ - NCT07437911Recruiting
Can a Supplement Help with Nutrient Gaps for GLP-1 Users?
This study tests whether a daily supplement can help fill nutrient gaps and improve gut health for people who are already taking GLP-1 weight-loss medications (like Ozempic or Wegovy). Participants must be on a stable dose for at least 8 weeks and be generally healthy without other chronic conditions.
Santa Monica, CaliforniaAges 18–59 - 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 - NCT05934188Recruiting
Study how gut signals relate to brain aging and diseases
This study looks at how the gut may influence the brain in normal aging and conditions like Alzheimer’s, Parkinson’s, and multiple sclerosis. It may help researchers understand new ways to measure or treat these brain changes over time.
Venice-Lido, VeniceAges 20–90 - NCT07264998Recruiting
Gut bacteria study in breast cancer patients on Abemaciclib
This study looks at how gut bacteria changes in people taking Abemaciclib (a breast cancer drug) and whether that relates to diarrhea. It may help find ways to prevent or manage this side effect.
Wuhan, HubeiAges 18–75
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Common questions
- Are there clinical trials for gut microbiome?
- Yes. Clin2 currently lists 141 recruiting gut 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 gut 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 gut 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.