Clinical trials
Microbiota clinical trials
Below are recruiting microbiota clinical trials, each written for real people, not researchers. We’re tracking 377 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06800469Recruiting
Gut bacteria study in pancreatic cancer surgery patients
This trial looks at gut bacteria in people having surgery for pancreatic cancer. It aims to understand how these bacteria might affect recovery or treatment outcomes.
Bologna, BOAges 18 years+ - NCT06776029RecruitingPhase 2
Fecal transplant for radiation-induced rectal bleeding
This study tests whether a fecal (stool) transplant can help heal rectal damage caused by pelvic radiation. The treatment may decrease bleeding and improve symptoms for people whose supportive care hasn't worked well.
Guangzhou, GuangdongAges 18–75 - 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 - NCT06730451Recruiting
Fecal transplant for gut health after organ transplant
This trial tests whether fecal microbiota transplantation (Washed Microbiota Transplantation, or WMT) can help people who have gut problems like diarrhea, constipation, or infection after receiving a solid organ transplant. It aims to restore healthy gut bacteria.
Nanjing, JiangsuAges Any age - NCT06641778Recruiting
Fecal transplant for drug-resistant Klebsiella pneumonia
This trial tests whether transplanting healthy donor stool into the lungs can help treat a severe pneumonia caused by a bacteria that is resistant to many antibiotics. It may offer a new option for people whose infection is not responding to standard treatments.
Wuhan, HubeiAges 18–75 - 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 - NCT06532110Recruiting
Gut bacteria study in chronic digestive diseases
This study looks at the bacteria in your gut (the microbiome) in people with chronic gut conditions. Researchers want to understand how gut bacteria differ in these conditions to help improve treatments.
Hamilton, OntarioAges 18–75 - NCT06496412Recruiting
Fecal transplant for brain health in type 1 diabetes
This trial tests whether transplanting healthy bacteria into your gut can improve memory and thinking skills in people with long-term type 1 diabetes. If you have had type 1 diabetes for 10 years or more, this study may help find a new way to protect your brain.
Changsha, HunanAges 18–60 - 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+ - NCT03983473Recruiting
Testing stool samples to find gut bacteria markers in inflammatory arthritis
This study looks at stool (poop) samples to see whether gut bacteria patterns can help identify certain inflammatory arthritis conditions in people who have Crohn’s disease or axial spondyloarthritis. It’s mainly about matching stool “biomarkers” to diagnoses, which may help doctors recognize these conditions more accurately in the future.
Nancy, LorraineAges 18 years+ - 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 - 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+ - 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+ - NCT06290258RecruitingPhase 1/Phase 2
Fecal transplant for autism with stomach issues
This study tests if transplanting healthy bacteria into the gut can help children and young adults with autism who also have stomach problems. It aims to improve both digestive and behavioral symptoms.
Taoyuan CityAges 7–30 - NCT06286709RecruitingPhase 2
Fecal transplant for PSC and colitis
This trial tests whether a fecal (stool) transplant from a healthy donor can help people with both PSC and inflammatory bowel disease. It aims to see if the treatment can improve liver health and reduce inflammation. You must have early to moderate liver scarring and be on stable medications.
BirminghamAges 18 years+ - NCT06228937Recruiting
Gut bacteria and lymphedema with repeated infections
This study looks at the bacteria in your gut and how they relate to lymphedema (swelling) and repeated skin infections in the affected limb. It compares people who have many infections with those who have none, to better understand why some get infections and others don't.
RomeAges 18–85 - NCT06218602RecruitingPhase 2
Fecal transplant for lymphoma patients getting CAR T therapy
This trial tests whether giving a fecal transplant (a stool enema from a healthy donor) can improve the response to CAR T-cell therapy in people with B-cell lymphoma. It may help by restoring healthy gut bacteria that are often wiped out by strong antibiotics.
Houston, TexasAges 18 years+ - NCT06215222Recruiting
Studying gut bacteria in IBS and digestive issues
This study uses a tiny capsule to collect samples from your small intestine to learn about gut bacteria in people with IBS or other functional gut disorders. It could help researchers understand what causes digestive symptoms.
Redwood City, CaliforniaAges 18–70 - NCT06192693RecruitingPhase 3
Fecal transplant to improve diabetes after weight loss surgery
This trial tests whether transferring healthy stool bacteria from a lean donor can help improve blood sugar control in people with type 2 diabetes who still have high blood sugar 1-5 years after weight loss surgery.
ParisAges 18–65 - NCT06182293Recruiting
Mouth bacteria in early systemic sclerosis
This study looks at the bacteria in the mouth (periodontal microbiota) of people with early systemic sclerosis compared to those without the condition. It may help understand if there is a link between oral health and systemic sclerosis.
StrasbourgAges 18 years+ - 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 - 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 - NCT06058520RecruitingEarly Phase 1
Capsule microbiome transplant for hidradenitis suppurativa
This trial tests whether taking capsules containing healthy gut bacteria (fecal microbiota transplant) can help treat hidradenitis suppurativa. You may qualify if you have HS and haven't taken antibiotics in the last 30 days.
Minneapolis, MinnesotaAges 18 years+
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Common questions
- Are there clinical trials for microbiota?
- Yes. Clin2 currently lists 377 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.