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
- NCT04788914Recruiting
Test saliva or blood markers to track kidney and leg disease treatment
This study looks at a gene marker (“lncRNA,” a natural molecule in the body) to see how well an oral absorbent, with or without probiotics, is helping people with chronic kidney disease (CKD) who also have blocked leg arteries. It may help doctors better measure treatment impact and tailor care.
Taipei, TaiwanAges 20 years+ - 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+ - NCT04819217Recruiting
Probiotics and a toxin binder to slow chronic kidney disease
This trial studies an oral product (a “uremic toxin” absorber) plus probiotics to help slow the progression of chronic kidney disease. It may help by lowering harmful gut-related substances that can build up when kidney function is reduced.
TaipeiAges 20 years+ - NCT06768931RecruitingPhase 2
Combination therapy before surgery for triple-negative breast cancer
This trial tests adding an immunotherapy drug to standard chemotherapy before surgery for triple-negative breast cancer. The goal is to see if this combination works better than chemotherapy alone.
Lanzhou, GansuAges 18 years+ - NCT06728098Recruiting
Testing safety of a gut-health probiotic in healthy adults
This trial is testing a new probiotic called Akkermansia muciniphila in healthy adults. It aims to see if the supplement is safe and well-tolerated, possibly helping with gut health.
Jakarta Pusat, Jakarta Special Capital RegionAges 18–60 - 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+ - NCT06722443Enrolling by invitation
Probiotics and Prebiotics for Obesity
This trial tests whether adding probiotics and prebiotics to your diet can help with obesity and related health problems like prediabetes, diabetes, high cholesterol, or high blood pressure.
Granada, SpainAges 18–75 - NCT06677840Recruiting
Probiotics and the gut-brain connection in autism
This study looks at how the gut and brain are linked in children with autism. It tests whether probiotics can help improve behavior and symptoms by studying the bacteria in the gut.
TaipeiAges 4–15 - NCT06670807Recruiting
Probiotic supplement for mild memory loss
This study tests whether a probiotic (a supplement with helpful bacteria) can help slow down memory and thinking problems in people with mild cognitive impairment (MCI). It is for adults aged 60–85 who have noticed their memory getting worse over time but can still handle daily activities.
Madrid, MadridAges 65–85 - NCT06636669Enrolling by invitationPhase 4
Probiotics to prevent repeat joint infection after replacement surgery
This trial tests whether taking probiotics can help prevent another infection in people who have had a hip or knee replacement that became infected. If you are scheduled for revision surgery due to an infection, this study may be a good fit.
Boston, MassachusettsAges 18–90 - NCT06560879Enrolling by invitationPhase 2
Probiotics to prevent stomach problems in children with leukemia
This trial tests whether probiotics can help prevent stomach and gut side effects from chemotherapy in children with leukemia. If your child is between 6 and 17, in the right phase of treatment, and doesn't have any major gut issues, they may be eligible.
Mexico City, CoyoacanAges 6–17 - NCT06514664Enrolling by invitation
Do probiotic toothpastes help gums and teeth?
This trial tests whether using a probiotic toothpaste can improve gum health in people with gum disease (periodontitis). It may help reduce inflammation and slow bone loss.
KütahyaAges 18–99 - NCT06448767Recruiting
Probiotics for autism symptoms in children
This study tests whether a daily probiotic supplement (a mix of good bacteria) can help reduce autism symptoms in children. It lasts 3 months and involves filling out questionnaires about your child's behavior at the start and end of the trial.
Warsaw, WarsawAges 7–15 - NCT06422988Enrolling by invitation
Probiotics for preventing severe NEC in premature babies
This study looks at whether giving probiotics (good bacteria) to very premature babies (born before 32 weeks) can lower the risk of a serious gut problem called necrotizing enterocolitis (NEC). The researchers will review medical records of babies born between 2016 and 2022 in England and Wales.
LondonAges Up to 7 months - NCT06308497Enrolling by invitation
Periodontal treatment with CoQ10 and probiotics for pregnant women
This study tests whether a combination of coenzyme Q10 and probiotics can improve gum health in pregnant women. It aims to find a safe, gentle treatment for gum problems during pregnancy.
Pavia, LombardyAges 18–40 - NCT06122207Recruiting
Probiotic for women with fertility issues and IVF
This study tests whether a probiotic (a pill with beneficial bacteria) can help improve the health of the female genital tract for people with fertility problems who are undergoing IVF. It aims to see if this can improve chances of pregnancy.
LisbonAges 18–45 - NCT06039644Recruiting
Probiotics for breast cancer patients on chemotherapy
This trial tests whether taking a probiotic supplement can help breast cancer patients going through chemotherapy. If you are between 20 and 80 years old, have stage I-III breast cancer, and are receiving certain chemo drugs, this study may be for you.
TaipeiAges 20–80 - NCT06051123Recruiting
Probiotics for ALS and related disorders
This trial tests whether probiotics (healthy bacteria) can help people with ALS. You'll take a probiotic or placebo daily for several months, and researchers will track your symptoms and gut health.
Fredericton, New BrunswickAges 18 years+ - NCT05791604Recruiting
Study prebiotics and probiotics to help children with Prader-Willi
This trial studies whether taking prebiotics and probiotics can help children with Prader-Willi syndrome manage obesity. It’s testing a gut-focused approach to weight control over the study period.
Shanghai, Shanghai MunicipalityAges 3–10 - NCT05568498RecruitingPhase 2
Probiotic trial for depression in Parkinson’s disease
This Phase 2 study tests whether taking probiotics can improve depression and mood symptoms in people with Parkinson’s disease. It’s meant for those with mild to moderate depression and stable Parkinson’s and mood treatments.
Vancouver, British ColumbiaAges 40–80 - NCT05090267Recruiting
Gut-brain treatments for alcohol use and memory changes
This study tests whether gut-brain–targeted treatments (including probiotics and stimulation of a nerve) can improve thinking and inflammation-related health in people who use alcohol. You may be able to join if you have memory/thinking problems and meet specific medical limits, including HIV immune system levels.
Coral Gables, FloridaAges 35–70 - NCT04362826Recruiting
Probiotic supplement study for breast cancer patients
This study tests whether taking a probiotic supplement affects the bacteria and fungi in your gut, which may be linked to your breast cancer. You'll take a daily probiotic and have your diet and activity stay the same, to see if it helps your body respond to treatment.
Cleveland, OhioAges 18–65 - NCT03613545RecruitingPhase 2/Phase 3
Fecal transplant to treat irritable bowel syndrome
This study tests whether transferring stool bacteria from a healthy donor (fecal microbiota transplantation) can improve symptoms of irritable bowel syndrome (IBS). It may help by changing the gut bacteria that can influence digestion and gut discomfort.
Guangzhou, GuangdongAges 18–75 - NCT03418857RecruitingPhase 1/Phase 2
Probiotics for weight- and blood-sugar–related gut health
This trial tests whether taking probiotics can improve gut health in people with early metabolic problems related to extra body fat, cholesterol, blood pressure, or blood sugar. It’s a Phase 1/2 study, meaning safety and early effectiveness are being tested.
University Park, PennsylvaniaAges 55–75
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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.