Clinical trials
Microbiota clinical trials
Below are recruiting microbiota clinical trials, each written for real people, not researchers. We’re tracking 376 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07083882RecruitingPhase 2
Capsule transplant for newly diagnosed type 1 diabetes
This study tests if taking capsules with processed donor stool can help preserve insulin-making cells in people recently diagnosed with type 1 diabetes. The treatment aims to slow the loss of insulin production.
AmsterdamAges 18–45 - NCT06974994Recruiting
Antibiotic Use in Newborns and Gut Bacteria Health Study
This study explores how antibiotics given during delivery affect a baby's gut bacteria and long-term health. If you are pregnant or just gave birth and received antibiotics during labor, you and your newborn may be able to join.
Turku, Valitse Maakunta.Ages 2 hours+ - NCT07075601Recruiting
Study of bacteria on heart valves during cardiac surgery
This study looks at the types of bacteria living on heart valves removed during surgery. Researchers want to learn more about these bacteria to better understand heart valve health and infections.
Toulouse, FranceAges 18 years+ - NCT06144905Recruiting
Norwegian Gut Bacteria Study in Anorexia Nervosa
This study looks at gut bacteria in women with anorexia nervosa compared to healthy women. It aims to understand how gut health relates to the condition and recovery.
Ås, ÅsAges 16–50 - NCT07058961Recruiting
Intensive care gut bacteria study
This study looks at gut bacteria changes in people in the ICU with severe brain injury or multiple trauma/shock. It uses a noninvasive breathing measurement to see how energy needs relate to the gut's microbes.
RouenAges 18 years+ - NCT05035342RecruitingPhase 3
Fecal transplant to clear resistant gut bacteria
This Phase 3 study tests whether a fecal microbiota transplant (FMT) can eliminate hard-to-treat bacteria in the gut, such as ESBL or carbapenem-resistant bacteria. If it works, it may reduce future infections and antibiotic-resistant illness.
ClichyAges 18–105 - NCT06159244Recruiting
Gut bacteria in severe alcoholic hepatitis
This trial looks at the gut bacteria (microbiome) in people with severe alcoholic hepatitis to understand how it affects the illness. It may help doctors find better ways to treat this condition.
Amiens, PicardieAges 18–75 - NCT07046897Recruiting
Probiotic study: Gut bacteria and your health
This trial tests if eating probiotic bacteria changes the types of bacteria in your gut. It may help researchers understand how probiotics affect overall health.
LundAges 18–65 - NCT07052071Recruiting
TAVI's effect on gut bacteria in aortic stenosis
This study looks at how a heart valve procedure called TAVI affects the bacteria in your gut. It may help doctors understand how the procedure impacts your overall health.
AthensAges Any age - 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+ - NCT07015580Recruiting
Mouth bacteria in pancreatitis types
This study looks at the bacteria in your mouth to see if they are different in chronic pancreatitis and autoimmune pancreatitis. It might help doctors understand these diseases better.
Shanghai, Shanghai, ChinaAges 18 years+ - NCT07010445Recruiting
Gut-brain connection in resistant epilepsy
This study looks at how the gut and brain talk to each other in people with epilepsy, especially when seizures are hard to control. It may help find new ways to treat epilepsy by focusing on the gut.
Milan, LombardyAges 3–50 - NCT06346093Recruiting
Fecal transplant for advanced stomach cancer
This trial tests whether a fecal transplant (a stool donation from a healthy person) can help patients with advanced stomach cancer respond better to treatment. If you qualify, you would receive the transplant through a colonoscopy, possibly along with other standard therapies.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT06931808Enrolling by invitationPhase 4
Fecal transplant with chemo, radiation, and immunotherapy for advanced colon cancer
This study tests a combination of fecal microbiota transplant, chemotherapy, radiation, and immunotherapy (sintilimab) for people with locally advanced rectal cancer. The goal is to see if this approach improves treatment outcomes.
Ningbo, ZhejiangAges 18–75 - NCT03928431Recruiting
Restore gut bacteria in newborns using special microbiome samples
This study looks at whether restoring a newborn’s gut bacteria (microbiome) can improve early health. Babies are treated based on the birth conditions, especially whether delivery was vaginal or by C-section.
Stockholm, Stockholm CountyAges 5 minutes–15 minutes - NCT05439135Recruiting
Fecal microbiome transplant to treat malnutrition after GI surgery
This trial tests whether “washed microbiota transplant” (a treatment using processed gut bacteria) can improve malnutrition in adults who developed it after certain upper gut surgeries. It may help by restoring helpful gut bacteria, but you must meet several medical and safety checks.
Nanjing, JiangsuAges 18 years+ - NCT06447220Recruiting
Washed Microbiota Transplant for Malnutrition
This trial studies if a special, cleaned-up version of fecal transplant (called washed microbiota transplantation) helps treat malnutrition in adults. It is for people who have already had this transplant and have either lost a significant amount of weight or have a low body mass index (BMI).
Nanjing, JiangsuAges 18 years+ - NCT06727877Recruiting
Predicting bowel disease in premature babies using gut bacteria
This study looks at the gut bacteria of premature babies to see if changes can predict a serious bowel condition (ulcero-necrotizing enterocolitis). It aims to use artificial intelligence to help doctors catch it early.
Clermont-FerrandAges Up to 1 day - NCT04997733RecruitingPhase 3
Stool transplant to maintain Crohn’s remission after stopping anti-TNF
This Phase 3 study tests whether transplanting stool bacteria can help people with Crohn’s stay in remission after they stop an anti-TNF medicine. It may help some patients who are currently doing well but need to come off anti-TNF treatment.
ParisAges 18–74 - NCT05967871RecruitingPhase 1
Testing poop-based therapy for kids with SIBO
This early study tests whether fecal microbiota transplant (a stool donation placed into the gut) is safe and practical for children with small intestinal bacterial overgrowth (SIBO). It may help reduce SIBO symptoms, but the main goal is to see if the treatment and study steps work well.
Hamilton, OntarioAges 3–18 - NCT06563947RecruitingPhase 2
Fecal transplant for advanced liver cancer after treatment stops working
This trial tests whether giving a fecal transplant (a procedure that replaces the bacteria in your gut) can help people with advanced liver cancer whose current treatment has stopped working. It may help boost your immune system to fight the cancer.
ShenzhenAges 18–75 - NCT06376331Recruiting
Washed gut bacteria transplant for ADHD
This trial tests whether transplanting specially cleaned gut bacteria from healthy donors can help children with ADHD. It aims to see if improving the balance of gut bacteria can reduce ADHD symptoms.
Nanjing, JiangsuAges 3–17 - NCT06340217Recruiting
Washed Microbiota Transplant for Diabetic Stomach Paralysis
This trial tests a new treatment called washed microbiota transplantation for diabetic gastroparesis, a condition where the stomach empties slowly due to diabetes. If you have had diabetes for over a year and struggle with bloating or feeling full quickly, this study may explore whether transplanting healthy gut bacteria can help relieve your symptoms.
Nanjing, JiangsuAges 18–100 - NCT06321536RecruitingPhase 2
Testing microbiota therapy for resistant bacteria in the gut
This study tests a treatment made from healthy donor stool (called microbiota therapy) given as an enema or through a feeding tube. It aims to help people who carry resistant bacteria that are hard to treat, by reducing or clearing those bacteria from the gut.
Atlanta, GeorgiaAges 18 years+
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Common questions
- Are there clinical trials for microbiota?
- Yes. Clin2 currently lists 376 recruiting microbiota 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 microbiota 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 microbiota 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.