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
- NCT06539832Recruiting
Gut bacteria and immunity in people with an abnormal blood protein
This study looks at how your gut bacteria (intestinal flora) and immune system relate to a condition called monoclonal gammopathy, where an abnormal protein is found in the blood. The trial will check samples from your blood, plasma, and stool to understand these connections.
Guanzhou, GuangdongAges 45 years+ - NCT07724522Recruiting
Prebiotic Fiber for Irregular Periods in Women
This study tests whether taking a prebiotic fiber (inulin) can help women who are in the later years of their reproductive life (before menopause) and have irregular periods. You may be eligible if you are overweight, have irregular cycles, sit a lot, and do not exercise much.
Washington D.C., District of ColumbiaAges 40–55 - 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 - NCT07718555Recruiting
Gut bacteria study for autoinflammatory diseases
This study looks at the gut bacteria (microbiome) in people with autoinflammatory diseases. It may help researchers understand how bacteria in the gut affect inflammation and find better ways to treat these conditions.
ParisAges 12 years+ - 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 - 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 - NCT07704255RecruitingPhase 4
Fecal transplant for stubborn H. pylori infection
This study tries a fecal microbiota transplant (placing healthy donor stool into your gut) to get rid of stubborn H. pylori infection that hasn't been cured by standard treatments. It's for people who have failed several rounds of therapy and have a stomach condition that makes eradication important.
Chengdu, SichuanAges 18–80 - NCT06197698Recruiting
Parkinson's and gut-brain connection study
This study is looking at how the bacteria in your gut might affect your brain in Parkinson's disease. It involves two types of brain scans to see differences between people with Parkinson's and healthy volunteers.
DouliuAges 20 years+ - NCT06655233Recruiting
Exploring gut bacteria in pancreatic cancer tumors
This trial studies bacteria found inside pancreatic tumors to see if they can help diagnose or predict the course of the disease. You may be eligible if you have a suspected pancreatic cancer and need a special biopsy (EUS-FNB).
Hunan, HunanAges 18–80 - 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 - NCT07686835RecruitingPhase 2
High-fiber diet to help immunotherapy work better in advanced melanoma
This trial tests if adding extra dietary fiber before and during immunotherapy can change gut bacteria to make the treatment more effective. It is for people with advanced melanoma who are about to start their first immunotherapy.
Nijmegen, GelderlandAges 18 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 - NCT06585982Recruiting
Synbiotics for MAFLD: gut health and liver fat study
This trial tests whether taking a synbiotic (a mix of helpful bacteria and fiber) can improve insulin levels and reduce inflammation in people with Metabolic Dysfunction-Associated Fatty Liver Disease (MAFLD). It may help by changing the balance of bacteria in your gut.
Semarang, SemarangAges 25–55 - NCT06631937Recruiting
How infant feeding affects gut health and immunity
This study looks at how different feeding methods (like breast milk or formula) affect the development of healthy bacteria in a baby's gut and their immune system. It may help us understand what helps babies stay healthy.
AarhusAges birth–4 weeks - NCT06683248Recruiting
Night shifts and menstrual cycle health study
This study looks at how working night shifts affects your health throughout your menstrual cycle. It aims to help understand the risks and support better health for shift workers.
Uppsala, Uppsala CountyAges 18–35 - NCT07634159Recruiting
Health effects of ultra-processed food intake
This study compares the health effects of a diet high in ultra-processed foods (like packaged snacks and sugary drinks) with a diet of less processed foods, to see how they affect your body. If you qualify, you'll eat these diets for a period of time, and researchers will monitor your health.
GothenburgAges 20–60 - NCT07622849Enrolling by invitation
Fecal Microbiota Transplant for Transplant-Related Intestinal Damage
This trial tests whether transferring healthy gut bacteria from a donor to patients can help heal severe intestinal damage that occurs after bone marrow or stem cell transplants. The goal is to reduce pain, inflammation, and other complications from this serious side effect.
Suzhou, JiangsuAges 15–65 - NCT07618000Recruiting
Gut Health Formula Study for Adults with Extra Weight
This study tests a special formula designed to improve your gut bacteria and body composition. Researchers will track how it affects your digestive health and weight distribution over time.
Taipei, TaiwanAges 18–65 - NCT06704321Recruiting
Effects of TOTUM-448 on liver fat and heart health
This trial tests a supplement called TOTUM-448 to see if it can reduce liver fat and improve heart health in people with a fatty liver condition (MASLD). If you have excess liver fat and are overweight, this study could help find new ways to manage your condition.
Québec, QuebecAges 18–75 - 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 - NCT07597213Recruiting
Hyaluronic acid to help gum disease treatment in smokers
This study tests whether adding hyaluronic acid (a natural substance) to standard gum disease treatment helps smokers recover better. Gum disease is serious in smokers, and this treatment might improve healing.
IstanbulAges 18–65 - NCT07592975Recruiting
Food with Fiber and B-Vitamins for Gut Health in Older Adults
This study tests whether adding special fibers (prebiotics) and B-vitamins to food can improve your gut bacteria, reduce inflammation, and support mental health. You'll eat fortified foods for several weeks while researchers track changes in your digestion and wellbeing.
Coleraine, County LondonderryAges 50 years+ - NCT07585669Recruiting
Omega-3 Supplements for New Celiac Disease Patients
This study tests whether omega-3 fatty acids (a type of fish oil supplement) can reduce inflammation and improve gut health in people newly diagnosed with celiac disease. Participants will follow a gluten-free diet while taking the supplement to see if it helps their body heal.
Santiago, Metropolitan RegionAges 18–65
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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.