Clinical trials
Gut Microbiota clinical trials
Below are recruiting gut microbiota clinical trials, each written for real people, not researchers. We’re tracking 158 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05054361Recruiting
Study gut immunity changes in children with type 1 diabetes
This study looks at how a type of immune cell (MAIT cells) and the gut (microbiota and gut lining) change around the time type 1 diabetes starts in children. It may help researchers understand why type 1 diabetes begins and how the gut and immune system are connected.
AntonyAges 1–15 - NCT07687940Recruiting
Baduanjin exercise and green tea for mood in older adults
This study tests if doing gentle Baduanjin exercises and drinking green tea together can help improve mood and quality of life in older adults. It also looks at how this program affects gut health.
Kwun TongAges 65–84 - 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 - NCT06642883Recruiting
A supplement for gut health in ulcerative colitis remission
This study tests a supplement called ProLife 10 FORTE to see if it affects the natural balance of gut bacteria in people with ulcerative colitis (UC) that is in remission. If you have UC that is not active and you meet other health criteria, you may be able to join.
Padua, PaduaAges 18–75 - NCT06157346Recruiting
Gut bacteria and growth in high-altitude children
This study looks at how gut bacteria affect growth and immune health in children aged 1 to 3 living at high altitudes. It may help find ways to support healthy development.
Shanghai, Shanghai MunicipalityAges 1–3 - NCT06673199Recruiting
Japanese diet and gut health in postmenopausal women
This study tests whether a traditional Japanese diet called 'washoku' can change the gut bacteria in postmenopausal women who are overweight. It may help improve health after menopause.
Poznan, WielkopolskaAges 45–65 - NCT04792320Recruiting
Probiotics and fiber for kidney disease with leg artery blockage
This study tests whether an oral absorbent plus probiotics can improve gut health and circulation in people who have chronic kidney disease and symptomatic peripheral artery disease (PAD). It will also track changes in blood markers and how well blood vessels function.
TaipeiAges 20 years+ - NCT07439640Recruiting
PEG laxatives for bowel prep and gut health after gallbladder removal
This study looks at how a common bowel prep medicine (PEG laxatives) affects gut bacteria in people who have had their gallbladder removed compared to those who still have one. It involves collecting stool samples before and after a colonoscopy to track changes over time.
Wuhan, HubeiAges 18–65 - NCT07611825RecruitingPhase 2
Gut Bacteria Treatment for Advanced Kidney Cancer Resistant to Immunotherapy
This study tests whether modifying your gut bacteria can help immunotherapy work again in advanced kidney cancer that has stopped responding to initial immune-checkpoint inhibitor treatment. Researchers will give you a special bacterial preparation along with a new immunotherapy drug to see if this combination can slow or shrink your cancer.
Nanjing, JiangsuAges 18–90 - NCT07599930Recruiting
Novel Snack for Perimenopausal Symptoms and Wellness
This study tests whether a specially designed snack can help reduce hot flashes, night sweats, mood changes, and other symptoms that happen during perimenopause (the years leading up to menopause). You'll eat the snack regularly and answer questions about how you feel.
London, LondonAges 40–55 - 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 - NCT02653001Enrolling by invitation
Testing samples in healthy people near Norwich Research Park
This study collects bowel-related samples from healthy people to help researchers test a “colon model” in the lab. You may be eligible if you live or work close by and you don’t have ongoing stomach/bowel conditions or recent major changes.
Norwich, NorfolkAges 18 years+ - NCT05587036RecruitingPhase 2/Phase 3
Rifaximin study to see how gut bacteria affect mood
This trial tests whether a gut-targeting antibiotic called rifaximin changes the gut microbiome (gut bacteria) and affects emotion. It is looking for healthy men so any mood or gut changes can be more clearly linked to the study treatment.
LeuvenAges 18–50 - NCT06784557RecruitingPhase 4
Study of ezetimibe's effect on gut bacteria
This trial tests whether ezetimibe, a cholesterol-lowering drug, changes the bacteria in your gut. It may help people with heart disease or high cholesterol who are already on a statin.
SeoulAges 19–80 - NCT06544915Recruiting
Synbiotic vs. probiotic for heart and gut health
This study tests whether a synbiotic (a combination of probiotics and prebiotics) is better than a probiotic alone or a placebo for improving gut health and heart health. If you are a healthy adult who hasn't taken antibiotics recently and has few heart disease risk factors, you may be able to join.
Saratoga Springs, New YorkAges 18–60 - NCT06292598Recruiting
Gut bacteria and sleep disorder study
This study compares gut bacteria and substances from the gut in people with type 1 narcolepsy versus those without. It aims to understand how gut health might be linked to this sleep disorder.
Nîmes, GardAges 10 years+ - NCT07672691Recruiting
How diet affects gut health and inflammation
This study looks at how different types of food (fats, carbs, protein) affect your gut bacteria, inflammation, and metabolism. It may help understand how diet can improve health.
KrakowAges 18–60 - 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 - NCT06896240Recruiting
Fiber smoothie trial for knee replacement patients
This trial tests if drinking a special fiber smoothie for 2 weeks before knee revision surgery can reduce inflammation and improve recovery. It is for people who are scheduled for knee replacement and have certain chronic health conditions.
New York, New YorkAges 40–80 - NCT06754319Recruiting
Gut bacteria and brain connection in child OCD
This study looks at how the bacteria in your gut might affect OCD in children and teens. It tests a possible link between your gut, brain, and OCD symptoms.
Shanghai, Shanghai MunicipalityAges 7–17 - NCT06845527Recruiting
Gut bacteria testing in a clinic study
This study looks at people who visit a special gut bacteria clinic. It aims to learn more about their health by testing their gut bacteria as part of regular care.
Rome, RMAges 18 years+ - NCT07724990Recruiting
Probiotic for gut health in mild-to-moderate colitis
This trial tests a specific probiotic (a type of beneficial bacteria) to see if it can help people with mild to moderate ulcerative colitis by improving the balance of gut microbes. It may be an option if you have not used many advanced treatments before.
Roma, RMAges 18–80 - NCT07715955Recruiting
Can probiotics help control appetite in adults with overweight or obesity?
This study tests whether taking probiotics can help regulate appetite in people who are overweight or have obesity. It aims to understand if these supplements can support weight management by affecting hunger and fullness signals.
Maastricht, LimburgAges 20–70 - NCT07264985Recruiting
Gut bacteria and diarrhea in breast cancer patients on pyrotinib
This study looks at how gut bacteria relate to diarrhea in breast cancer patients who are taking a drug called pyrotinib. By understanding this link, doctors hope to better manage side effects in the future.
Wuhan, HubeiAges 18–75
Hear when a new Gut Microbiota trial opens
We’ll email you when one opens — at most once a week, no account needed, unsubscribe anytime.
Common questions
- Are there clinical trials for gut microbiota?
- Yes. Clin2 currently lists 158 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.