Clinical trials
Probiotic clinical trials
Below are recruiting probiotic clinical trials, each written for real people, not researchers. We’re tracking 217 recruiting studies, each written for real people, not researchers, below.
Recruiting studies
- NCT06717659Recruiting
Probiotics for lung rehab in COPD patients
This trial tests if adding probiotics (healthy bacteria you take as a supplement) to your regular lung rehab program helps people with COPD breathe better and feel stronger.
New Taipei CityAges 18 years+ - NCT05652621Recruiting
Probiotics for people with ulcerative colitis symptoms
This study looks at whether probiotic pellets help people with inflammatory bowel disease, specifically ulcerative colitis. It may help improve gut symptoms, but the trial will test how well probiotics work for participants like you.
Xinxiang, HenanAges 18–80 - NCT07831317Recruiting
Probiotic for digestive comfort in women
This study tests a daily probiotic supplement to see if it helps with gas and bloating in women who also have signs of hormonal imbalance. If you qualify, you'll take the supplement and track your symptoms over the study period.
San Francisco, CaliforniaAges 25–45 - NCT07779265Recruiting
Probiotic supplement for gut health in healthy adults
This trial tests a daily probiotic supplement's effect on digestion, immune health, and overall well-being. If you're a healthy adult, you may help discover if this product can make you feel better day-to-day.
TrierAges 18–65 - NCT06385054RecruitingPhase 2
Probiotics for infant colic in breastfed babies
This study tests a probiotic (friendly bacteria) to see if it can reduce crying and fussing in babies with colic. It is for exclusively breastfed infants 8 weeks and younger who have colic symptoms.
Bécon-les-GranitsAges Up to 2 months - NCT07765004Recruiting
Probiotic supplement for constipation relief
This study tests whether a probiotic supplement can improve constipation symptoms like infrequent bowel movements or hard stools. It might help you have more regular, softer stools.
Suzhou, JiangsuAges 18–65 - 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 - NCT07693972Recruiting
Probiotic vs zinc mouthwash for bad breath and plaque in braces
This trial compares a probiotic mouthwash to a zinc and chlorhexidine mouthwash to see which is better at controlling bad breath and plaque for people with braces. It aims to find a gentler option that still works well.
Baghdad, AlkarghAges 18–30 - NCT06480604Recruiting
Probiotic for yeast infection prevention
This trial tests if taking a multi-strain probiotic daily can prevent repeat yeast infections in women who have had at least three infections in the past year.
Vadodara, GujaratAges 18–50 - NCT07645157RecruitingPhase 2
Sertraline and Probiotics for Teen Depression
This study tests whether combining an antidepressant medication (sertraline) with special bacteria supplements (probiotics) can help treat depression in teenagers ages 12–18. Researchers believe the probiotics may help the medication work better by improving gut health.
Chongqing, YuzhongAges 12–18 - NCT07619560Recruiting
Probiotic Cocktail to Slow Early Parkinson's Disease
This study tests whether a special blend of probiotics (good bacteria), an amino acid called tryptophan, and branched-chain amino acids can help slow the progression of early-stage Parkinson's disease. The idea is that these supplements may work through your gut bacteria to help protect your brain.
TaipeiAges 30–85 - NCT07605728RecruitingPhase 2
Probiotics to ease stomach problems from breast cancer treatment
This trial tests whether a special probiotic supplement (good bacteria) can reduce belly discomfort caused by abemaciclib, a hormone therapy drug for early breast cancer. You would take the supplement alongside your cancer treatment to see if it helps with stomach side effects.
TaipeiAges 18 years+ - NCT07606014RecruitingPhase 2/Phase 3
Probiotics to Support Mental Health Treatment
This study tests whether taking special probiotics (beneficial bacteria) can help prevent weight gain and metabolic changes when starting antipsychotic medications for psychosis. You'd take probiotics daily while beginning or recently starting one of four common antipsychotic drugs.
Leeuwarden, Provincie FrieslandAges 18–65 - NCT06710574RecruitingPhase 4
Probiotics for sleep problems in Parkinson's disease
This study tests whether taking probiotics can improve REM sleep behavior disorder (RBD) in people with Parkinson's disease. You will receive either a probiotic supplement or a placebo, and researchers will use brain scans to see how it affects your symptoms.
BeijingAges 40–85 - NCT06181513RecruitingEarly Phase 1
Probiotics for mild Alzheimer's disease
This study tests whether daily probiotics (beneficial bacteria) can help people with mild Alzheimer's disease. It's an early-phase trial to see if probiotics are safe and might improve thinking and memory.
NicosiaAges 65–85 - NCT07590999Recruiting
Probiotics and Menopause Symptoms: A Research Study
This study tests whether taking a probiotic supplement helps with hot flushes, mood changes, and other symptoms of perimenopause (the years around menopause). Researchers believe gut health may play a role in these symptoms.
Oxford, EnglandAges 45–60 - NCT07584278Recruiting
Probiotics and Biomarkers for Irritable Bowel Syndrome
This study tests whether probiotics (beneficial bacteria) can help reduce irritable bowel syndrome (IBS) symptoms and change certain markers in your gut. You'll take a probiotic supplement for 12 weeks while researchers track how your symptoms and gut health change.
GothenburgAges 18 years+ - NCT07585994Recruiting
Probiotic supplement for long-standing type 1 diabetes
This study tests whether taking a specific probiotic (a beneficial bacteria) for 4 weeks can improve immune function and metabolism in people who have had type 1 diabetes for at least 5 years. Researchers believe this probiotic may help the body's remaining insulin-producing cells work better.
AmsterdamAges 18 years+ - NCT07534033RecruitingPhase 2
Probiotic LR607 for newly diagnosed lung cancer
This study tests whether a probiotic supplement (LR607) can help patients with newly diagnosed non-small cell lung cancer—a common type of lung cancer. Probiotics are beneficial bacteria that may help your immune system fight cancer alongside standard treatments.
GuangzhouAges 18–80 - NCT06751979Recruiting
Probiotics for people with braces
This trial tests if a probiotic can improve oral health for people with braces. It might help reduce plaque buildup around brackets and wires.
AarhusAges 10 years+ - NCT07529457Recruiting
Probiotic treatment for constipation in adults
This study tests whether a probiotic product can help adults with constipation have more regular bowel movements. Probiotics are beneficial bacteria that may improve digestive health.
Suzhou, JiangsuAges 18–65 - NCT07533890Recruiting
Probiotics and gut health in children with inflammatory bowel disease
This study tests whether a multi-strain probiotic supplement can change the gut bacteria in children and teens with inflammatory bowel disease (IBD). Researchers will collect stool samples to see if the probiotics help restore healthy gut bacteria and potentially improve symptoms.
BernAges 5–18 - NCT07498127Enrolling by invitationPhase 2
Probiotics for colds in young children
This trial tests whether taking probiotics can help young children recover faster from common colds. If your child has a mild or moderate cold and is not taking other probiotics, they may be able to join.
Xuhui, Shanghai MunicipalityAges 3 months–6 years - NCT07470645Recruiting
Probiotics for stress and anxiety in students
This study tests whether taking a probiotic supplement can help reduce stress and anxiety in students. If you are a student aged 18-40 who experiences moderate stress and mild anxiety, and you don't have certain health conditions, you may be able to join.
LublinAges 18–40
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Common questions
- Are there clinical trials for probiotic?
- Yes. Clin2 currently lists 217 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.