Clinical trials
Microbiota clinical trials
Below are recruiting microbiota clinical trials, each written for real people, not researchers. We’re tracking 408 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06631586RecruitingPhase 2
Microbiota transplant for Crohn's disease
This study tests if a standardized fecal transplant is safe and helpful for adults with moderately to severely active Crohn's disease who are already on maintenance therapy. The goal is to see if this treatment can reduce inflammation in the digestive tract.
Minneapolis, MinnesotaAges 18–89 - 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 - 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 - 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 - 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 - NCT06690593Recruiting
Gut Microbiome Study for Healthy Adults Age 45+
This study compares the gut bacteria of healthy adults (age 45+) with those who have a blood condition called monoclonal gammopathy. The goal is to see if gut bacteria patterns differ between the two groups.
Guanzhou, GuangdongAges 45 years+ - 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 - 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 - NCT04046900RecruitingPhase 1/Phase 2
Fecal-style transplant of vaginal microbiome for recurring BV
This trial tests whether transplanting “good bacteria” into the vagina can treat recurrent bacterial vaginosis (BV). It may help restore a healthier vaginal bacterial balance and reduce BV episodes.
Boston, MassachusettsAges 18–50 - NCT06714903Recruiting
Gut bacteria and immunotherapy for advanced colon cancer
This study looks at how the bacteria in your gut might affect how well immunotherapy works for advanced colorectal cancer that has spread. It aims to find out if certain gut bacteria can help make treatment more effective.
Changchun, JilinAges 35–75 - NCT06724536Recruiting
Study of gut bacteria and TKIs in chronic myeloid leukemia
This trial looks at how gut bacteria affect the way chronic myeloid leukemia (CML) patients respond to tyrosine kinase inhibitor (TKI) medications. It may help doctors understand why some people have better outcomes than others.
TorinoAges 18 years+ - NCT06735651Recruiting
Wild blueberries for gut, brain, and heart health in prediabetes
This study looks at whether eating wild blueberries can improve your gut health, brain function, and heart health if you have prediabetes. It may help lower your blood sugar and reduce your risk for diabetes and heart disease.
Atlanta, GeorgiaAges 20–65 - NCT06746220Recruiting
Effect of activity and probiotics on body and health in women
This study looks at how adding physical activity and/or probiotics might affect your body composition and health. It is for women who are students at the University of Orléans and do not already exercise regularly.
OrléansAges 18 years+ - NCT06747611RecruitingPhase 2
Gut bacteria transplant for alopecia areata
This study tests whether transplanting healthy gut bacteria can help people with moderate to severe alopecia areata regrow hair. You will take antibiotics to prepare your gut, then receive the transplant through a colonoscopy or capsules.
Minneapolis, MinnesotaAges 18–75 - NCT06758817Recruiting
Nutrition, gut health, and rheumatoid arthritis study
This trial tests if a specific diet can improve your rheumatoid arthritis symptoms by affecting your gut bacteria. You may be eligible if you have active RA and are willing to follow a special meal plan for several weeks.
Lisbon, PortugalAges 18 years+ - NCT06759324Recruiting
Kombucha for weight: live vs. pasteurized effects
This study compares the effects of live kombucha versus pasteurized kombucha on gut health, metabolism, and liver function in people who are overweight or obese. Participants will drink kombucha daily for a set period to see if it improves their health.
Castelo Branco, Castelo Branco DistrictAges 18–60 - NCT06781229Recruiting
Gum bacteria in people preparing for weight loss surgery
This trial looks at the bacteria in the mouths of people with a BMI of 30 or higher who are scheduled for weight-loss surgery. The goal is to understand how gum health and body weight are connected.
ToulouseAges 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 - NCT06805994RecruitingPhase 1
Restoring infant nose bacteria after staph treatment
This study tests whether giving a nasal spray of healthy bacteria to infants can restore good germs in the nose after they receive mupirocin ointment to treat Staph aureus. It aims to bring back a healthy nasal microbiome.
Baltimore, MarylandAges birth–60 years - NCT06828159Recruiting
Can wild blueberries improve joint health?
This study tests whether eating wild blueberries can improve joint health in people with arthritis. You would eat blueberries or a placebo daily for several weeks to see if they help with pain and stiffness.
Oklahoma City, OklahomaAges 40–75 - NCT06837194Recruiting
Stool transplant with feeding tube nutrition for dropped stomach
This study tests whether a combination of a stool transplant (washed microbiota transplantation) plus liquid nutrition through a feeding tube can help people with gastroptosis who are also malnourished. The goal is to improve stomach function and nutrition.
Nanjing, JangsuAges 18–100 - NCT06837272Recruiting
Gut health and brain health in Alzheimer's disease
This study looks at how the bacteria in your gut might be connected to memory and thinking problems in Alzheimer's disease. It may help us understand if changes in the gut can affect brain health.
Jining, ShandongAges 60–80 - NCT06867198Recruiting
Peanuts for heart, brain, and gut health
This study tests whether eating peanuts can improve health markers like blood sugar, brain function, and digestion in adults with prediabetes (higher than normal blood sugar levels). You may qualify if you are between 20-59 years old, have prediabetes, and a BMI in the overweight to obese range.
Atlanta, GeorgiaAges 20–59 - 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 408 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.