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
- NCT07459699Recruiting
Probiotics for kids with mild ADHD
This study tests whether a probiotic supplement can help children with mild ADHD by improving communication between the gut and the brain. It may offer a natural way to support focus and behavior.
ShanghaiAges 8–11 - NCT07443410Recruiting
Probiotics for gum disease treatment
This trial tests whether taking pre- and probiotics alongside non-surgical gum treatment improves healing and reduces harmful bacteria. It may help people with advanced gum disease (stage III or IV periodontitis).
Heidelberg, Baden-WurttembergAges 18 years+ - NCT07400367Recruiting
Probiotics and lifestyle changes for fatty liver disease
This trial tests whether taking probiotics plus making lifestyle changes can improve fatty liver and metabolic health. You may qualify if you have liver fat and at least one sign of metabolic problems like high blood sugar or high blood pressure.
New Taipei CityAges 18–80 - NCT05623007Recruiting
Diet and gut bacteria study for vaccinated teens with COVID
This trial tests whether changing diet can shift gut bacteria in overweight or obese teens after COVID-19 vaccination. The goal is to see if dietary changes can affect health markers related to the gut and immune system.
Jakarta Pusat, DKI JakartaAges 12–17 - NCT06151392RecruitingPhase 4
Probiotics and zinc for children with brain infection
This trial tests whether adding probiotics (healthy bacteria) and zinc supplements to standard treatment helps children with a brain infection called ventriculitis. It aims to see if these supplements improve recovery and reduce complications.
CairoAges 1 month–4 years - NCT07347743Recruiting
Probiotic supplement for crying and colic in healthy newborns
This trial tests whether a daily probiotic supplement can reduce excessive crying and colic in healthy, full-term newborns. If your baby is healthy and born at UZ Brussel, this study may help find a gentle way to soothe colic.
Jette, Brussels CapitalAges 1 day–2 weeks - NCT07345455Recruiting
Probiotics for improving sperm quality in male infertility
This trial tests whether taking probiotics can improve sperm quality in men with unexplained infertility. It may help if you have low sperm count, low motility, or abnormal shape.
New Taipei CityAges 20–45 - NCT07341087Recruiting
Probiotic drink study for skin inflammation in menopause
This study tests whether a daily probiotic drink can improve inflammatory skin conditions like rosacea, acne, or eczema in women aged 40 to 60. You will take the drink for 8 weeks and provide blood, skin, stool samples, and a photo of your face.
London, LondonAges 40–60 - NCT07331987Recruiting
Probiotics for mild to moderate anxiety or depression study
This trial tests if probiotics can help reduce symptoms of mild to moderate anxiety or depression. It is for people aged 18–60 who are not currently taking most anxiety or depression medications and who have not used them in the last 2 weeks (except for escitalopram).
Guangzhou, GuangdongAges 18–60 - NCT07333313Recruiting
Study of oral medicine and probiotics for kidney disease in diabetes
This trial tests if an oral medication that absorbs toxins plus probiotics can reduce inflammation and slow kidney damage in people with diabetes-related kidney disease (DKD). It may help those with mild to severe kidney function loss.
Taipei, TaiwanAges 20 years+ - NCT06595719Recruiting
Probiotics plus standard care for mild to moderate UC
This trial tests whether adding a multi-strain probiotic supplement to your usual care can help manage mild to moderate ulcerative colitis (UC). It lasts 12 weeks and requires you to stay on your current medications without changes.
Cheras, Kuala LumpurAges 18–90 - NCT07297966RecruitingPhase 2
Probiotics for recurrent respiratory infections in children
This trial tests if a daily probiotic can help young children who get frequent respiratory infections like colds and coughs. It aims to see if the probiotic reduces how often infections happen.
Xingyi, GuangdongAges 1 day–6 years - NCT07293910RecruitingPhase 2
Comparing stomach acid drugs for clearing H. pylori infection
This trial tests different combinations of stomach acid-reducing drugs, vitamin D or probiotics, to see which works best for clearing an H. pylori infection. H. pylori is a common stomach bacteria that can cause ulcers or stomach discomfort.
Shibīn al KawmAges 18–80 - NCT06583720RecruitingPhase 1
Light therapy and probiotics for bad breath
This trial tests a new approach for treating bad breath (halitosis) using a special light therapy combined with probiotics (good bacteria). It aims to see if this combination works better than standard treatments.
São Paulo, São PauloAges 18–60 - NCT07253155Enrolling by invitation
Probiotics for preventing gut symptoms in overweight adults
This study tests whether taking probiotics can help prevent stomach and gut discomfort in people who are overweight or have obesity. You may be eligible if you are at a certain weight and age, eat a balanced diet, and do not have chronic gut issues.
ColeraineAges 18 years+ - NCT06901791Recruiting
Probiotic supplement for gestational diabetes
This trial tests whether taking a probiotic called Lactobacillus Rhamnosus LRa05 can help manage blood sugar levels in women with gestational diabetes. If you've been diagnosed with GDM around 24 weeks of pregnancy, you may be eligible to join.
Suzhou, JiangsuAges 18–50 - NCT07213323Recruiting
Probiotics for Digestion During Weight-Loss Treatment
This study tests whether taking a probiotic (a type of 'good' bacteria) can improve digestion and gut health in people who are starting a GLP-1 RA medicine for weight loss. You would take the probiotic daily and answer questions about your digestive symptoms.
Pierre-BéniteAges 18–75 - NCT07212361Recruiting
Restoring infant gut bacteria with mother's microbes
This study tests whether giving healthy newborns a special mix of their own mother's friendly bacteria can help build a healthy gut. It is for mothers who had a healthy pregnancy, plan to breastfeed, and live near Helsinki.
HelsinkiAges Up to 50 years - NCT06929364Recruiting
Probiotics for endometriosis – a crossover trial
This study tests whether taking a probiotic supplement can help with endometriosis symptoms. It's for women 35 or younger with moderate to severe endometriosis, and involves a crossover design where everyone gets both the probiotic and a placebo at different times.
ZagrebAges Up to 35 years - NCT07193927RecruitingPhase 2
Testing a probiotic mix for fatty liver disease (MASLD)
This trial tests whether a probiotic mixture can improve liver health in people with moderate fatty liver disease (MASLD). It looks at how the probiotic affects liver fat, inflammation, and metabolism.
Girona, GironaAges 18–75 - NCT07200518Recruiting
Probiotics after spine surgery study
This trial tests if taking probiotics after spinal surgery helps recovery. It is for adults with a herniated disc, spinal narrowing, or instability in the lower back or neck.
MariborAges 18 years+ - NCT07189390RecruitingPhase 2
Probiotic study for infants who had antibiotics at birth
This study tests whether giving a probiotic (a 'good' bacteria) to babies who received antibiotics shortly after birth can help their developing gut and immune system. Participants will receive a daily probiotic or placebo for about 6 weeks, and their health will be monitored.
Adelaide, South AustraliaAges Up to 4 weeks - NCT06938464Recruiting
Probiotics to prevent gestational diabetes in high-risk women
This study tests whether taking probiotics (friendly bacteria) during early pregnancy can help prevent gestational diabetes in women who are at higher risk for it.
Hangzhou, ZhejiangAges 18–50 - NCT07182500RecruitingPhase 2
Can probiotics protect your gut while traveling?
This trial tests whether taking a probiotic supplement can help keep your gut bacteria healthy during a short trip abroad. It's a good fit if you are generally healthy and planning a vacation or business trip under a week.
Huangpu, Shanghai MunicipalityAges 18–65
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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.