Clinical trials
Microbiota clinical trials
Below are recruiting microbiota clinical trials, each written for real people, not researchers. We’re tracking 408 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- 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 - NCT06692179RecruitingPhase 1
Testing a freeze-dried fecal transplant during colon surgery
This trial tests if giving a special freeze-dried mixture of healthy gut bacteria right after colon surgery is safe and possible. It may help patients recover better after the procedure.
Minneapolis, MinnesotaAges 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 - 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 - 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+ - NCT06809660Recruiting
Gut bacteria and cancer risk from everyday chemicals
This study looks at how chemicals in the environment (called endocrine disruptors) might affect the natural bacteria in your gut and whether that could play a role in colorectal cancer. If you are having a colonoscopy (endoscopy), you may be able to participate.
PoitiersAges 18 years+ - 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+ - 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 - 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+ - 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+ - 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 - 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+ - 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+ - 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 - NCT07154173Recruiting
Gut bacteria study in metastatic colorectal cancer
This study looks at gut bacteria in people with colorectal cancer that has spread (metastatic). It aims to find patterns in the bacteria that may help doctors choose better treatments.
Guangzhou, GuangdongAges 18–75 - NCT07162662Recruiting
How Oral Sialic Acid Affects Gut Bacteria in Healthy People
This trial tests whether taking a supplement called sialic acid can change the bacteria in your gut in a healthy way. It is for adults who are generally healthy and not taking medications that affect digestion or metabolism.
Chongqing, Chongqing MunicipalityAges 18–75 - NCT07253701Recruiting
Epilepsy and gut bacteria: understanding treatment response
This study looks at how the bacteria in your gut relate to how well epilepsy treatments work. It compares people with newly diagnosed epilepsy (who haven't yet started medicine) to healthy people without epilepsy.
GothenburgAges 2–79 - NCT07268508Recruiting
Study of a gut-healthy diet after weight-loss surgery
This study tests how a special diet after weight-loss surgery affects gut bacteria, eating habits, and sense of taste and smell. Researchers want to see if this diet can improve long-term results.
LyonAges 25–65 - NCT07298811RecruitingPhase 1/Phase 2
Healthy eye bacteria for dry eye treatment
This study tests whether putting healthy bacteria from a family member's eye surface onto your eyes can help treat moderate to severe dry eye. You would receive standard dry eye drops plus the experimental transplant.
Nanchang, JiangxiAges 18–70 - NCT07319364RecruitingPhase 1
Fecal transplant study for cancer treatment side effects
This trial tests whether fecal transplants (putting healthy donor bacteria into your gut) can help with side effects like diarrhea, constipation, or nausea caused by cancer treatments. It is for people with advanced gastrointestinal cancer who are about to start their fourth round of chemo or targeted therapy.
Zhejiang, HangzhouAges 18 years+ - NCT07332260RecruitingPhase 1
Fecal transplant for Alzheimer's disease
This study tests whether a fecal transplant (transferring healthy bacteria from a donor's stool into your colon) can improve memory and thinking in people with mild to moderate Alzheimer's. You would receive the transplant via colonoscopy and have follow-up brain scans.
Tromsø, TromsAges 18 years+ - NCT07348471Recruiting
Gut bacteria transplant for ICU delirium
This study tests whether giving a transplant of healthy gut bacteria (called fecal microbiota transplantation) can help treat delirium in ICU patients. It may improve brain function by restoring gut health.
WuhanAges 18–80 - NCT07364617RecruitingPhase 2
Fecal transplant for steroid-resistant gut GVHD
This study tests if a fecal transplant (transferring healthy bacteria from a donor's stool into your gut) can help people with severe gut graft-versus-host disease that hasn't responded to steroids. It's for patients who have had a stem cell transplant and now have ongoing, severe gut symptoms.
TaoyuanAges Any age
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Common questions
- Are there clinical trials for microbiota?
- Yes. Clin2 currently lists 408 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.