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
- NCT07814456RecruitingPhase 2
Fecal transplant for ulcerative colitis comparing donor types
This trial tests fecal microbiota transplantation (a procedure that puts healthy donor bacteria into your gut) for left-sided ulcerative colitis. It compares results using donors from two different backgrounds to see if one works better.
Kunming, YunnanAges 18–60 - 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 - 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 - NCT03764748RecruitingPhase 1
Washed stool transplant for Tourette syndrome in kids
This Phase 1 study tests whether a “washed” stool microbiota transplant can reduce Tourette syndrome tics in children. It aims to see if changing gut bacteria is safe and may improve tic severity.
Nanjing, JiangsuAges 6–17 - NCT04014413Recruiting
Fecal transplant for gut and immune-related conditions
This trial studies whether fecal microbiota transplantation (FMT)—a medical procedure using stool from a screened donor to restore gut bacteria—can improve safety and outcomes for people with certain bowel, immune, and metabolic conditions. It may help if your symptoms are thought to be related to an unhealthy gut microbiome, though eligibility is broad and depends on specific safety factors.
Hong Kong, ShatinAges Any age - NCT07762729Enrolling by invitation
Gut bacteria and metabolic health in children over 3 years
This study looks at how the bacteria in the gut (gut microbiota) relate to metabolic health in children over a 3-year period. By participating, you will help researchers understand early development, and you'll receive regular health check-ups.
Yiyang, HunanAges birth–3 years - NCT07755111Recruiting
Breathing and tongue exercises for children's mouth bacteria
This trial tests if simple breathing and tongue exercises can help improve the bacteria in children's mouths. It includes children ages 7-12 who breathe through their mouth or nose.
Istanbul, BahcelievlerAges 7–12 - NCT07746635Recruiting
Fecal transplant for obese women with polyendocrine ovarian syndrome
This study tests whether a fecal microbiota transplant (putting healthy bacteria from a donor into your gut) can help women with polyendocrine ovarian syndrome and obesity improve their chances of a successful frozen embryo transfer. It may help by balancing the bacteria in your gut, which could improve your overall health and fertility.
Shanghai, Shanghai MunicipalityAges 20–40 - NCT04926103Recruiting
Fecal transplant program for active ulcerative colitis donors
This trial screens people as potential donors for a fecal microbiota transplant program used for ulcerative colitis. It checks safety and eligibility so the transplant process is as safe as possible for people with active disease.
Hamilton, OntarioAges 18 years+ - NCT04447742Recruiting
Study of how healthy babies’ gut microbes develop from birth
This study follows pregnant people from about 20 weeks until delivery, to understand how gut microbes (tiny organisms in the intestines) develop in healthy babies. It may help researchers learn how early-life gut development affects health later on.
BernAges 18–45 - NCT07639177RecruitingPhase 2
Fecal Microbiota Transplant for Hard-to-Treat Rheumatoid Arthritis
This trial tests whether transferring healthy gut bacteria from a donor to patients with rheumatoid arthritis that hasn't improved on standard medications can reduce joint pain and swelling. The goal is to see if rebalancing the gut microbiome (the community of bacteria in your intestines) helps control inflammation.
Beijing, Beijing MunicipalityAges 18–65 - NCT07624409Enrolling by invitationEarly Phase 1
Occupational health study for high-altitude workers
This study examines how working at high altitudes (where there is less oxygen in the air) affects employees at an astronomical observatory in Chile. Researchers want to understand health impacts and develop better support for people working in these extreme conditions.
San Pedro de Atacama, AntofagastaAges 20–50 - NCT07619560Recruiting
Probiotic Cocktail to Slow Early Parkinson's Disease
This study tests whether a special blend of probiotics (good bacteria), an amino acid called tryptophan, and branched-chain amino acids can help slow the progression of early-stage Parkinson's disease. The idea is that these supplements may work through your gut bacteria to help protect your brain.
TaipeiAges 30–85 - NCT07606053Enrolling by invitation
Endometrial Microbiota and IVF Success
This study examines whether the bacteria living in the uterine lining (endometrium) affect whether embryos implant and pregnancies continue after IVF. Researchers will collect tissue samples and study your microbiota—the community of microorganisms in your body—to help explain repeated implantation failures or miscarriages.
ThessalonikiAges 18–54 - 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 - NCT05606523Recruiting
Test gut bacteria treatment for weight loss in pancreatic cancer
This study looks at how changing the gut microbiome (gut bacteria) may help people with pancreatic cancer regain strength and slow or reverse cancer-related weight loss (cachexia). It also studies gut bacteria differences in people with pancreatic cancer who are losing weight versus those whose weight is stable, and in healthy volunteers.
GenevaAges 18 years+ - NCT07578103Recruiting
Dairy vs Plant-based Yogurt for Weight and Bone Health
This study compares how dairy yogurt and plant-based yogurt affect weight, body composition, bone strength, and gut bacteria in postmenopausal women. It may help identify which type of yogurt is better for overall health during this life stage.
Québec, QuebecAges 40 years+ - 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 - NCT07550023Recruiting
How Different Dietary Fats Affect Your Gut Health
This study examines how different types of dietary fats influence the bacteria in your gut and how your body processes nutrients. By participating, you'll help researchers understand the link between fat intake and digestive health in healthy adults.
GlasgowAges 20–50 - NCT05943197Recruiting
Microbiology-focused choice of joint prosthetic material
This trial focuses on using lab testing (microbiology) to help choose the best material for a prosthetic used in orthopedic treatment. If you need a prosthetic, this could help doctors select a material more tailored to your situation.
SamaraAges 1 month–1 month - NCT07490054RecruitingPhase 1
Fecal transplant for chronic heart failure
This trial tests whether transferring healthy gut bacteria (fecal microbiota transplant) can help people with chronic heart failure feel better and improve their heart function.
New York, New YorkAges 18 years+ - NCT04932577RecruitingPhase 2/Phase 3
Fecal transplant to treat complications of liver cirrhosis
This trial studies whether transferring healthy gut bacteria (from a donor sample) can improve outcomes for people with liver cirrhosis who have worsening complications. It may help by changing the gut microbiome, which can influence inflammation and liver health.
AarhusAges 18–75 - NCT07463248RecruitingPhase 2
PULSAR with Fecal Transplant for Advanced Liver Cancer
This trial tests a new combination treatment (PULSAR plus fecal microbiota transplant) for people with advanced liver cancer that stopped responding to initial therapy. It aims to see if this approach can help control the cancer again.
Chengdu, SichuanAges 18–75 - NCT07461233Recruiting
Gut Health and Synbiotics in Hemodialysis
This study tests whether taking a special mix of friendly bacteria and prebiotics (called synbiotics) can help improve gut health in people on hemodialysis. It may reduce inflammation and other complications related to kidney disease.
Taichung, Wuqi DistrictAges 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.