Clinical trials
Probiotic clinical trials
Below are recruiting probiotic clinical trials, each written for real people, not researchers. We’re tracking 214 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT05698862Recruiting
Study how gut bacteria affect brain and behavior
This study looks at how gut bacteria may influence brain function and behavior, through a chemical called GABA. It may help researchers understand brain–gut links, though it is not yet a treatment trial.
ReadingAges 18–50 - NCT05604846Recruiting
Probiotic drops for very preterm babies in Scandinavia
This trial studies whether giving probiotic supplements to extremely preterm newborns helps improve health outcomes. It’s meant for babies born very early, and the results could help guide safer early nutrition and care.
Solna, Stockholm CountyAges 5 months–6 months - 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 - NCT06284577Recruiting
Quality of life and gut health in children with cystic fibrosis
This study looks at how a drug called ETI (a combination of three medicines) affects the quality of life and gut health of children with cystic fibrosis. If you or your child has the right type of CF and is between 2 and 18 years old, this trial may help us understand how treatment improves daily life and digestion.
OsloAges 2–18 - NCT07817290Recruiting
Food supplement for heart and blood sugar health in older adults
This study tests a specially designed food (a nutraceutical) to see if it can help improve heart health and blood sugar control in older adults. If you are 65 or older, have heart disease and mild diabetes or prediabetes, you might be able to join and potentially benefit from this simple dietary approach.
NovaraAges 65 years+ - NCT06505330Recruiting
Probiotics for kids with cleft palate
This study looks at whether giving probiotics (helpful bacteria) to children with cleft palate can improve the bacteria in their airways and possibly prevent infections. Researchers want to see if this simple treatment helps keep kids healthier.
Edegem, AntwerpAges 6 months–2 years - NCT05328999Recruiting
Study links fertility, pregnancy loss, and gut microbes
This trial studies how gut bacteria (your “microbiome”) may relate to infertility, recurrent pregnancy loss, and time to pregnancy. It may help researchers understand what could be changed to improve fertility outcomes.
Graz, StyriaAges 18–50 - NCT07786116Recruiting
Gut bacteria in Parkinson's disease and related conditions
This study looks at how certain gut bacteria (methanogens) are involved in the progression of Parkinson's disease and related conditions. It aims to understand the connection between gut health and brain health, which may lead to better treatments.
Cambridge, CB2Ages 55 years+ - NCT06428422Recruiting
Probiotic supplement for advanced lung cancer
This trial tests if taking a probiotic supplement along with your standard lung cancer treatment can help you live longer and respond better to therapy. It is for people with advanced non-small cell lung cancer who have not tried immunotherapy before.
KonyaAges 19–90 - NCT06074250RecruitingPhase 2/Phase 3
Pregnancy, mood, and gut health study
This study tests whether a nutritional supplement can help prevent depression and anxiety during and after pregnancy. It looks at how the mother's gut bacteria may influence mood.
Toronto, OntarioAges 18–43 - NCT07758335RecruitingPhase 4
Probiotics and trace elements for ulcerative colitis
This trial tests whether adding a probiotic supplement and trace elements to your current treatment helps manage mild to moderate ulcerative colitis. It aims to see if these additions can improve symptoms and quality of life.
CairoAges 18–65 - NCT06609447RecruitingPhase 4
Probiotic with vedolizumab for moderate ulcerative colitis
This study tests whether adding a special probiotic (VSL#3) to vedolizumab helps people with moderate ulcerative colitis more than vedolizumab alone. You may qualify if you are already planning to start vedolizumab and haven't responded well enough to other treatments.
Beijing, Beijing MunicipalityAges 18–85 - 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 - NCT07720232RecruitingPhase 4
Probiotic plus lipid-lowering for pancreatitis from high triglycerides
This trial tests if adding a probiotic (Bacillus subtilis and Enterococcus faecium) to standard lipid-lowering therapy helps people with mild pancreatitis caused by very high triglycerides. It aims to see if the combination reduces inflammation and speeds recovery.
Xiamen, FujianAges 18–65 - NCT05894746Recruiting
Study to improve blood sugar and reduce inflammation
This study looks at how an intervention may improve blood sugar control and lower inflammation in the body. You may be able to take part unless you have a specific condition called celiac disease.
GothenburgAges 6 years+ - NCT07694791Recruiting
Gut health supplements for people on peritoneal dialysis
This trial tests whether taking probiotic and prebiotic supplements can improve gut health in people receiving peritoneal dialysis at home. It may help with digestion and overall well-being.
Monterrey, Nuevo LeónAges 18 years+ - NCT07665658Recruiting
Supplements for ADHD: Calming brain inflammation in kids
This study tests whether special supplements can help calm inflammation in the brain and improve ADHD symptoms in children. It might be a good fit if your child's ADHD is diagnosed and they are not taking antibiotics or have other health issues like gut problems or severe allergies.
Peshawar, KPKAges 6–12 - NCT07656623Recruiting
Probiotics for IBS with stomach issues and stress
This trial tests whether a special probiotic blend can help people with irritable bowel syndrome (IBS) who also have stomach symptoms like heartburn, bloating, or nausea, and feel anxious, depressed, or stressed. It aims to see if the probiotic improves both gut and mood symptoms.
Hanoi, HanoiAges 18 years+ - NCT07660367Recruiting
Probiotic comparison for children's diarrhea
This study compares two types of probiotics to see which works better for treating acute watery diarrhea in children aged 1 to 5 years. Children with mild to moderate dehydration and malnutrition may be eligible.
Lahore, Punjab ProvinceAges 1–5 - NCT07645001Recruiting
Probiotics plus diabetes medicine for pregnancy blood sugar
This study tests whether adding probiotics (beneficial bacteria) to standard diabetes medication helps manage high blood sugar during pregnancy. Researchers hope this combination may improve health outcomes for both you and your baby.
Rawalpindi, Punjab ProvinceAges 18–45 - NCT07630584Recruiting
How a New Infant Formula Supplement Affects Healthy Babies
This study tests a dietary supplement for healthy newborns to see if it helps them grow well and digest food properly. Researchers will collect stool samples and track the baby's health over time.
Cavite City, ManilaAges 2 weeks–4 weeks - NCT07624409Enrolling by invitationEarly Phase 1
Occupational health study for high-altitude workers
This study examines how working at high altitudes (where there is less oxygen in the air) affects employees at an astronomical observatory in Chile. Researchers want to understand health impacts and develop better support for people working in these extreme conditions.
San Pedro de Atacama, AntofagastaAges 20–50 - NCT07603895Recruiting
Probiotic treatment for yeast infections
This study tests whether a probiotic product (good bacteria) can help treat vulvovaginal yeast infections alongside standard care. You'll use the probiotic for a set period and report how your symptoms improve.
Torrevieja, AlicanteAges Any age - NCT05767450Recruiting
Test for early type 1 diabetes in children
This study looks at children who have just started insulin for new-onset type 1 diabetes. It aims to test an intervention early in the course of the disease, which may help change how the immune system and diabetes progress.
Milan, MilanAges 7–17
Hear when a new Probiotic 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 probiotic?
- Yes. Clin2 currently lists 214 recruiting probiotic 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 probiotic 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 probiotic 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.