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
- NCT07080333Recruiting
Bladder cancer and the gut microbiome study
This study looks at the bacteria in your gut and bladder to understand how they may relate to bladder cancer. It is for men who are having their first tumor removal for suspected bladder cancer, and helps researchers learn if the microbiome plays a role.
CannesAges 18 years+ - NCT07085299Recruiting
Gut bacteria and recovery in brain artery narrowing
This study looks at how the bacteria in your gut might affect outcomes in people with narrowed brain arteries. Researchers will track your health over time to see if there are links between your gut bacteria and your recovery.
Nanjing, JiangsuAges 30–80 - NCT07076329Recruiting
Using a special diet to prevent malnutrition in older heart patients
This trial tests whether a special type of food can help prevent malnutrition in older adults with heart failure or atrial fibrillation. It looks at how the bacteria in your gut and inflammation in your body affect your brain and overall health.
FlorenceAges 70 years+ - NCT05655780Recruiting
Irinotecan care guided by tumor genes and gut bacteria
This study looks at whether a patient’s tumor genetic makeup and gut bacteria activity can predict how well irinotecan-based treatment works and what side effects they might have. It may help personalize treatment to improve survival and quality of life for people with metastatic or unresectable colon cancer.
Maastricht, LimburgAges 18 years+ - NCT07066033Recruiting
Gut bacteria study for kids with eating disorders
This study looks at the gut bacteria of children and teens with eating disorders like anorexia or avoidant/restrictive food intake disorder. It aims to understand how the gut and brain are connected, which may lead to better treatments.
Madrid, MadridAges 7–18 - NCT07069140Recruiting
Lactoferrin mouthwash for gum health during pregnancy
This study tests if a daily lactoferrin mouthwash can improve gum health in pregnant women with gum disease, without needing antibiotics or other treatments. Researchers want to see if this natural protein helps keep gums healthier during the second trimester.
Pavia, LombardyAges 18–45 - NCT07065942Recruiting
Lactulose for gut health in diabetes with constipation
This study tests if a common stool softener called lactulose can improve gut health and metabolism in people with type 2 diabetes and long-term constipation. It aims to see if changing gut bacteria can help both digestion and blood sugar control.
BeijingAges 18–70 - NCT07029360Recruiting
Coenzyme Q10 and Probiotics for Gum Health in Pregnancy
This trial tests whether adding coenzyme Q10 and probiotics to standard gum treatment can improve gum health and reduce inflammation in pregnant women. If you are in your second or third trimester and have gum concerns, this treatment may help both you and your baby.
Pavia, LombardyAges 18 years+ - NCT06998823Recruiting
Probiotics during cancer therapy study
This study looks at how taking a probiotic supplement affects survival, treatment response, and gut bacteria in people undergoing cancer therapy. It may help you understand if adding probiotics can improve your treatment outcomes.
New Taipei CityAges 20 years+ - NCT07009223Recruiting
Lifestyle changes to prevent memory issues in depression
This study tests whether healthy lifestyle changes—like diet, exercise, or stress management—can help prevent memory and thinking problems in people with depression. It aims to find ways to protect your brain health as you age.
BresciaAges 50–80 - NCT06687382RecruitingPhase 2
MBK-01 for recurrent diverticulitis
This trial tests MBK-01, capsules made from healthy gut bacteria, to see if they can help people who keep getting diverticulitis. If you've had three or more bouts in the last three years, this study might offer a new treatment option.
Madrid, MadridAges 18–70 - NCT03298334RecruitingPhase 1/Phase 2
Testing vaginal bacteria transfer to newborns after C-section
This study looks at whether they can safely place “healthy vaginal bacteria” from the mother into the newborn after a scheduled C-section, and whether it improves the baby’s health. It only enrolls certain mothers and babies based on infection testing and other health factors.
Falls Church, VirginiaAges birth–50 years - NCT06298409RecruitingPhase 1
Rifaximin for SIBO: Gut Bacteria Study
This study tests how Rifaximin (a medicine for SIBO) affects the bacteria and other substances in your gut. You'll swallow a small capsule that collects samples as it travels through your digestive system, so researchers can see how your gut changes during treatment.
Mountain View, CaliforniaAges 18–80 - NCT06957626Recruiting
Predicting polyp return after removal
This study aims to develop a tool using gut bacteria and metabolites to predict if high-risk colon polyps will come back after removal. If you are between 40 and 75 and have had certain types of colon polyps removed, you may be able to help us build better prediction methods.
BeijingAges 40–75 - NCT04292067Recruiting
Study gut bacteria in people with arthritis
This study compares the gut microbiome (the bacteria in your intestines) in adults with spondyloarthritis or rheumatoid arthritis versus healthy adults. It aims to better describe differences that may help explain these diseases.
Boulogne-BillancourtAges 18 years+ - NCT06941090Recruiting
Stool sample collection for nutrition gut health study
This study asks participants of the NutriNet-Santé health study to provide a stool sample. Researchers want to understand how diet and gut bacteria affect health.
BobignyAges 18 years+ - NCT05723913Recruiting
Test functional foods on blood sugar and gut bacteria
This study looks at how eating specific functional foods affects blood sugar after meals and changes in gut bacteria. It may help people understand ways to support healthy blood sugar and digestion, but it’s not for people with diabetes.
Mexico City, Mexico CityAges 18–60 - NCT06926166Recruiting
Genes and germs in early life study
This study looks at how genes and tiny organisms in your body (microbiota) affect early childhood development. It involves storing blood and stool samples from you and your child to help researchers learn more.
GuangzhouAges Any age - NCT06929845Recruiting
Organoid models for liver cancer study
This study uses tumor samples to create lab-grown mini-livers (organoids) to better understand liver cancer. It may help researchers learn more about the disease and develop new treatments.
RomaAges 18 years+ - NCT06924333Enrolling by invitation
Skin bacteria study in eczema
This study looks at the bacteria and other tiny organisms living on your skin to learn more about skin conditions like eczema. It may help doctors understand why some people get these skin problems.
Lund, Skåne CountyAges 18 years+ - NCT06001333Recruiting
Fecal transplant to clear superbugs from the gut
This study tests whether a fecal transplant (FMT) can remove certain antibiotic-resistant bacteria from your gut. It might help people who carry superbugs like CPE or VRE but aren't currently on antibiotics.
Chuncheon, Gangwon-doAges 20 years+ - NCT06896240Recruiting
A smoothie supplement before and after knee revision surgery
This study tests whether drinking a special smoothie each day for 2 weeks before and after your knee revision surgery helps reduce inflammation and improve recovery. It is for people who have health conditions that cause inflammation, like diabetes or heart disease, and who are getting a knee replacement.
New York, New YorkAges 40–80 - NCT06895018Enrolling by invitation
Grape Drink Trial for Diabetes and Fatty Liver
This study tests a drink made from grape pomace (a natural byproduct) that is rich in polyphenols—compounds that may help the liver and heart. Participants have type 2 diabetes and mild fatty liver, and researchers want to see if the drink improves liver health, blood sugar, and gut bacteria over several months.
NaplesAges 35–70 - NCT06871111RecruitingPhase 1
Bacteria treatment study for liver disease patients
This trial tests whether giving a mixture of helpful bacteria can improve gut health in people hospitalized with serious liver problems. It aims to see if restoring these bacteria can help with recovery.
Chicago, IllinoisAges 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.