Clinical trials
Gut Microbiota clinical trials
Below are recruiting gut microbiota clinical trials, each written for real people, not researchers. We’re tracking 145 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT07864779Recruiting
Barley and kefir for gut health in active adults
This study looks at how eating barley and drinking kefir affects the good bacteria in your gut. If you are physically active and have a high fitness level, you may be able to join and help us learn more about foods that could support gut health.
BergenAges 18–55 - 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+ - NCT07471373Recruiting
Pesticides and infertility study in endometriosis
This study looks at how pesticides might affect fertility in women with endometriosis, focusing on stress markers and gut/genital bacteria. You will provide samples and answer questions so researchers can compare women with and without endometriosis.
SalouëlAges 18–43 - NCT07400354Recruiting
PD-1 drug plus chemo for advanced stomach cancer based on gut bacteria
This trial tests if adding a PD-1 immunotherapy drug to standard chemotherapy works better for advanced stomach cancer, and looks at how your gut bacteria may affect treatment. It is for people who have not had chemotherapy before and are starting their first treatment.
Shanghai, Shanghai MunicipalityAges 18 years+ - 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 - NCT07257913Recruiting
How dairy in food guide affects gut health
This study looks at how adding dairy products to the Canadian Food Guide affects the health of your gut. If you have a larger waistline but no major health issues or food allergies, this trial may help you learn more about your digestion.
Québec, QuebecAges 40–65 - NCT07212361Recruiting
Restoring infant gut bacteria with mother's microbes
This study tests whether giving healthy newborns a special mix of their own mother's friendly bacteria can help build a healthy gut. It is for mothers who had a healthy pregnancy, plan to breastfeed, and live near Helsinki.
HelsinkiAges Up to 50 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 - 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 - NCT07124260Recruiting
Gut and tongue bacteria study for low ovarian reserve
This study looks at the bacteria in your gut and on your tongue to see if they are different in women with low ovarian reserve. It may help doctors find new ways to understand and treat this condition.
Hangzhou, ZhejiangAges 20 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+ - 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 - NCT07388121Recruiting
Vitamin C and gut health in healthy adults
This trial tests whether taking vitamin C supplements changes the bacteria in your gut and how well your gut works. If you are a healthy adult, you may be able to join.
GlasgowAges 18–65 - 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 - 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 - NCT05071131Recruiting
Inulin supplement to improve gut health in kidney disease
This trial studies whether taking inulin—a dietary fiber—can improve gut bacteria and the gut barrier in people with end-stage kidney disease on hemodialysis. It may help reduce gut-related problems that can affect overall health in kidney disease.
BerlinAges 18–75 - NCT07333482Recruiting
Flourish: How gut bacteria grow in C-section babies
This study looks at the gut bacteria of infants born by C-section. Researchers want to learn how the microbiome develops in healthy babies who have not taken probiotics.
Austin, TexasAges birth–3 months - NCT07848594Recruiting
Temperature-regulating bed cover for sleep and health
This study tests whether a special temperature-regulating bed cover can improve sleep quality and reduce body inflammation, and how it affects gut health and your body's internal clock. You will use the bed cover and other devices at home, and provide blood and stool samples to see how your body responds.
Newton Center, MassachusettsAges 45 years+ - NCT07567794Recruiting
Gut-Brain Connection Study in Parkinson's Disease
This research examines how the gut and brain are connected in Parkinson's disease and aims to better understand the disease. You'd participate in visits and tests over three years, including some involving your digestive system.
Stanford, CaliforniaAges 21–80 - 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 - NCT05758961Recruiting
Study of gut bacteria in adults living in France
This study looks at the types of bacteria in your gut (gut microbiota) by analyzing a stool sample. It aims to better describe typical gut bacteria patterns in France and may help researchers understand links to health.
BobignyAges 18 years+ - NCT05739825Recruiting
Fecal transplant to change gut bacteria in C. difficile infection
This trial studies whether fecal microbiota transplantation (a procedure that transfers healthy stool bacteria) can change a person’s gut bacteria after repeated C. difficile infection. It may help reduce recurring infections by restoring a healthier balance of gut microbes.
RomaAges 18–90 - NCT06691100Recruiting
How one workout changes gut bugs in women
This study looks at how a single workout changes the bacteria in your gut. It compares women who are very fit with women who don't exercise much, and includes women with different body types.
Washington D.C., District of ColumbiaAges 21–40 - NCT07094984Recruiting
Clearing resistant gut bacteria: three FMT methods
This trial tests three different ways to clear antibiotic-resistant bacteria from your gut using fecal microbiota transplant (FMT). It may help if you have a confirmed resistant infection and are looking for a treatment to reduce the risk of future infections.
WarsawAges 18 years+
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Gut Microbiota trials by city
Studies with a site in or near these metro areas.
Common questions
- Are there clinical trials for gut microbiota?
- Yes. Clin2 currently lists 145 recruiting gut 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 gut 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 gut 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.