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
- NCT06388863Recruiting
Fecal transplant for constipation in Parkinson's disease
This study tests whether a treatment called fecal microbiota transplantation (FMT) can help relieve constipation in people with Parkinson's disease. FMT uses healthy donor stool to improve gut bacteria, which may ease constipation and possibly improve Parkinson's symptoms.
Shanghai, Shanghai MunicipalityAges 40–75 - NCT06624865Recruiting
Gut bacteria and small-intestine neuroendocrine tumor study
This study looks at how bacteria in your gut may affect the growth of small-intestine neuroendocrine tumors. If you are having surgery to remove one of these tumors, the research team will collect samples and data to better understand the link between your gut bacteria and the tumor.
Lyon, FranceAges 18 years+ - NCT07226674Recruiting
Study of gut health and plant nutrients for brain health
This trial tests whether a natural plant compound can help support memory and thinking in people at higher risk for Alzheimer's disease. You may qualify if you are over 50, overweight, eat a typical Western diet, and have a family history of Alzheimer's.
ColeraineAges 50 years+ - NCT07229521Recruiting
Nattokinase for heart, gut, sleep, and brain health in metabolic syndrome with sleep issues
This study tests whether a supplement called nattokinase can improve heart health, sleep, thinking, and gut bacteria in people with metabolic syndrome and mild-to-moderate sleep apnea. If you have a larger waist, blood pressure or blood sugar issues, or imbalanced cholesterol, and have been diagnosed with mild or moderate sleep apnea, you may be eligible.
TaipeiAges 18 years+ - NCT06288464Recruiting
Fiber in tube feeding to improve gut health
This trial tests adding fiber to liquid food given through a stoma before stoma reversal surgery. The goal is to see if it helps improve the balance of good bacteria in the gut.
Preston, LancashireAges 18 years+ - NCT07213271Recruiting
Exercise study for obese breast cancer survivors
This study tests whether a physical exercise program can improve metabolism, gut health, fitness, and quality of life in obese women who have completed breast cancer treatment at least one year ago.
BratislavaAges 25–70 - NCT07220369Recruiting
Gut mini-pill study: testing a new capsule
This trial tests a special mini-pill that may help your gut health. You'll take the pill and provide stool samples while eating provided meals.
Boston, MassachusettsAges 50–75 - NCT01905709Recruiting
Fecal transplant to treat recurring C. difficile infection
This trial studies using a fecal microbiota transplant (FMT)—healthy gut bacteria moved from a screened donor—to help treat recurring or hard-to-control C. difficile infection. It may help restore a healthier gut environment when standard treatments keep failing or the infection returns.
Englewood, New JerseyAges 18 years+ - NCT06789484Recruiting
Study of gut bacteria in healthy newborns
This study looks at the gut bacteria of healthy, full-term newborns whose parents plan to breastfeed exclusively. It aims to understand how the gut microbiome develops in early life.
HvidovreAges Up to 1 day - NCT07211321Recruiting
Diet, inflammation, and muscle loss in older adults
This study looks at how diet and gut health relate to muscle loss (sarcopenia) in adults 60 and older. It aims to understand links between inflammation, gut bacteria, and muscle strength so we can find better ways to prevent frailty.
Lanzhou, GansuAges 60 years+ - NCT06355583RecruitingPhase 2
Gut bacteria transplant before stem cell transplant
This trial tests whether giving a transplant of healthy gut bacteria (fecal microbiota transplant) before a stem cell transplant can improve outcomes for people with certain blood cancers or bone marrow disorders.
Birmingham, EnglandAges 18 years+ - NCT07199998Recruiting
How tampons and cups affect your vaginal health
This study looks at how tampons and menstrual cups affect your body's natural defenses and the healthy bacteria in your vagina. You might join if you are a healthy woman between 18 and 49 who has regular periods and uses or is willing to use these products.
Paris, Île-de-France RegionAges 18–49 - NCT07198984Recruiting
Boosting gut bacteria to improve digestive health
This study tests whether boosting certain gut bacteria can improve your gut health. If you're a healthy adult who exercises regularly or eats a flexitarian diet, this trial may be for you.
Jouy-en-JosasAges 20–80 - NCT07196189Recruiting
Fecal transplant for eating disorders
This study tests whether a fecal microbiota transplant (transferring healthy donor stool into your gut) can help treat eating disorders like anorexia, bulimia, or binge eating disorder. It is for women ages 18 to 50 who have not had antibiotics in the last 3 months.
RouenAges 18–50 - NCT07182500RecruitingPhase 2
Can probiotics protect your gut while traveling?
This trial tests whether taking a probiotic supplement can help keep your gut bacteria healthy during a short trip abroad. It's a good fit if you are generally healthy and planning a vacation or business trip under a week.
Huangpu, Shanghai MunicipalityAges 18–65 - NCT07172191Enrolling by invitation
Fecal transplant for adults with blood cancer and infections
This trial tests whether transplanting healthy donor bacteria (fecal microbiota) into the gut can help adults with blood cancers who have stubborn infections, C. diff, or complications after stem cell transplant. It may reduce dangerous germs and improve gut health.
Budapest, BudapestAges Any age - NCT07156422Recruiting
Study of sensitive scalp in women without skin disease
This study is for women who have a sensitive scalp — feeling itchy, burning, or uncomfortable — but no scalp disease like psoriasis. Researchers want to understand what causes this sensitivity so they can help people like you.
BrestAges 18 years+ - NCT07153809Recruiting
Fecal transplant for severe acute pancreatitis recovery
This trial tests whether a fecal transplant (transferring healthy gut bacteria from a donor) can help people with severe acute pancreatitis. It is for adults who are about 2 weeks past the onset of the disease and have started to recover but still have fluid buildup in the pancreas.
Shanghai, Shanghai MunicipalityAges 18–70 - NCT07129174Recruiting
Lung bacteria changes in neurosurgery ICU patients with breathing tubes
This study looks at how tiny organisms in the lungs (the lung microbiome) change in neurosurgery patients who need a breathing tube in the ICU. It aims to see if these changes affect recovery or outcomes.
Beijing, Beijing MunicipalityAges 18 years+ - NCT07110311Recruiting
How pet cats affect nose and gut bacteria in cat allergy patients
This study looks at how living with a pet cat might affect the bacteria in your nose and gut if you have dust mite and cat allergies. It could help us understand if cats actually change your allergy symptoms or the balance of bugs in your body.
Nanjing, JiangsuAges 18–65 - NCT07106580RecruitingPhase 1/Phase 2
Fecal transplant capsules for clearing drug-resistant bacteria from the gut
This trial tests whether taking capsules containing processed healthy donor stool (fecal microbiota transplant) can safely remove certain drug-resistant bacteria (like CRE, ESBL-E, and VRE) from your intestines. It may be an option for people who have these bacteria in their stool but are not currently being treated with antibiotics.
RijekaAges 18 years+ - NCT06968234Recruiting
Liver disease breath test study
This study uses a special breath test to learn about chronic liver disease. If you have liver disease or cirrhosis, you may be able to help by providing a breath sample.
Shanghai, Shanghai MunicipalityAges 18 years+ - NCT07093463Recruiting
Colon-delivered Vitamin B2 for Gut Health
This trial tests whether a special form of vitamin B2 (riboflavin) delivered to the colon can improve gut health in people with mild to moderate bowel complaints. The study compares the effects of this supplement to a standard diet add-on (inulin) and looks at changes in gut bacteria and symptoms.
Berlin, State of BerlinAges 50–70 - NCT07081698Recruiting
Walnuts as a first solid food for healthy babies
This study tests whether adding walnuts (ground into a powder or paste) as a first solid food is safe and healthy for breastfed babies. It may help families understand how to introduce nuts early.
Fort Collins, ColoradoAges 5 months–5 months
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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.