Testing Probiotic for small intestinal bacterial overgrowth
Official title: The Safety And Efficacy Of A Probiotic Intervention On Lactulose Hydrogen Breath Test-Positive Patients And Related Gastrointestinal Symptoms
- 3 groups
- One site, in Calgary
- Recruiting
Interventions
- Other intervention
Probiotic
The intervention consists of a probiotic either with a low or high dosage
Canadian Sites (1)
1 of 1 recruiting
- Recruiting
Nimble Science
Calgary, Alberta
Eligibility Criteria
See who this study is looking for37 criteria
The trial’s own eligibility text, word for word from the registry. Only the trial site can say who takes part.
Inclusion
- +Aged 18-65 years old at the inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → of the study, both female and male subjects.
- +Signed Informed ConsentInformed consentThe process of being told what taking part involves, then choosing freely.Read more →; willing and able to comply with study procedures.
- +Willing to maintain their diet and physical activity levels during the study.
- +Able to swallow a size-00 capsule (23mm length and 9mm width).
- +Participants with at least one of the following Rome IV diagnoses: FABD, functional diarrhea, IBS-M, or IBS-D.
- +BaselineBaselineYour starting measurements, taken before treatment begins.Read more → weekly average of worst daily (in past 24 hours) abdominal bloating/distension score of \>= 3.0 on a 0-to-10-point scale.
- +Participants with abnormal LHBT following the North American Consensus recommendations (A rise in hydrogen of ≥20 ppm by 90 min).
Exclusion
- −Allergy to the components present in the probiotic and placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → capsules.
- −History or diagnosis of immunological diseases, infectious diseases or immune-compromised conditions, which in the opinion of the investigatorPrincipal investigatorThe doctor or researcher responsible for running the study at a site.Read more →, would adversely affect study safety or outcome. Such as, but not limited to, hepatitis, tuberculosis, HIV positive, Parkinson's, multiple sclerosis, AIDS, lymphoma, and long-term corticosteroid treatment.
- −History of less than three (3) bowel movements per week.
- −With the diagnosis of IBS-C.
- −Persons with central venous catheters.
- −History of known structural gastrointestinal abnormalities such as structures or fistulas leading to mechanical obstruction.
- −Use of any medications in the week prior to the screeningScreeningThe checks done before joining, to see whether a study fits.Read more → study visit, unless part of regular treatment, that could substantially alter gastrointestinal motor function (e.g., opioids, anticholinergics, or GLP-1 analogues); laxative use is allowed if used less than 3 times a week and it is willing to keep unchanged in the week prior to the SIMBA capsule ingestions. Proton pump inhibitors (PPIs) are allowed provided a wash-outWashout periodA gap with no treatment, so the previous one clears your system.Read more → period of 48 hours is respected before swallowing the SIMBA capsules and PPI treatment is resumed only 4 hours thereafter.
- −o Prokinetic use. Potential participants who are not using prokinetics to treat SIBO may be eligible after a 2-week washout period, and willing to not use prokinetics for the study duration.
- −Unable to stop using laxatives or prokinetic medications for 4 days before the study procedure (BT). Laxatives can be resumed after the test is conducted.
- −Organic motility disorder, including gastroparesis, intestinal pseudo-obstruction, systemic sclerosis, Ogilvie's syndrome.
- −Celiac disease (treated or untreated).
- −Any significant heart, liver, lung, kidney, blood, endocrine or nervous system disease, which in the opinion of the investigator, would adversely affect study safety or outcome.
- −Cancer diagnosis or treatment within the past year (non-melanoma skin cancers are acceptable).
- −Gastrointestinal inflammatory diseases, including ulcerative colitis, Crohn's disease, microscopic colitis.
- −Participants with IBS presenting with alarm symptoms such as: rectal bleeding, unexplained weight loss, iron deficiency anemia, and nocturnal symptoms,
- −Participants over the age of 50 or older who have not had:
- −a colon cancer screening by either a negative FIT or FOBT test within the last 2 years; OR
- −a colonoscopy in the prior 10 years which was negative for colorectal cancer
- −Epilepsy diagnosis.
- −History of oropharyngeal dysphagia, or other swallowing disorder with a risk of capsule aspiration.
- −Antibiotic use (except for topical use) ≤ 12 weeks prior to screening. Potential participants may be eligible once a 12-week washout is completed.
- −Regular use of probiotics, prebiotics or synbiotics (including food and drinks containing added probiotics and/or probiotic yogurts with live, active cultures) within 1 month prior to screening. Potential participants may be eligible once a 1-month washout is completed.
- −Any prior Fecal Microbiota Transplantation.
- −Alcohol or drug abuse.
- −Are non-English speaking.
- −Are scheduled for an MRI at any time during the study. Potential participants may be eligible to participate once their MRI procedure is completed.
- −Pregnant or breastfeeding.
- −Planning to become pregnant.
- −Prior gastrointestinal disease, surgery, or abdominal or pelvic radiation treatment which, in the Investigator's opinion, would lead to intestinal structuring or obstruction with a risk of capsule non-excretion, including, e.g., achalasia, eosinophilic esophagitis, any IBD, or previous esophageal, gastric, small intestinal, or colonic surgery. Appendectomy or cholecystectomy more than 3 months before the screening visit is acceptable.
- −Known history abdominal radiation treatment.
In plain language
Assembled directly from this trial’s registry record. Every sentence traces to a field below — nothing here is generated or interpreted.
What this study is
This study is testing a treatment for a condition.
This study is not organised into the usual phase numbers — that is common for device, behavioural, and diagnostic research.
From the trial registry
Built from these fields:
- designModule.designInfo.primaryPurpose
- designModule.phases
Who receives what
There are 3 groups in this study.
Groups A and B receive Probiotic.
Registry label: A: Probiotic (High dose) · B: Probiotic (Low dose)
Group C receives no study treatment and is followed for comparison.
Registry label: C: Control group (Placebo)
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].label
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
How the study is run
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
From the trial registry
Built from these fields:
- designModule.designInfo.allocation
- designModule.designInfo.maskingInfo.masking
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives no study treatment at all, and is followed for comparison.
From the trial registry
Built from these fields:
- armsInterventionsModule.armGroups[].type
- armsInterventionsModule.armGroups[].interventionNames
Who the study is looking for
The study lists an age range of 18 years to 65 years.
The study is open to people of any sex.
The study does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
These are the criteria the study lists. Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part.
From the trial registry
Built from these fields:
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How big and how long
The study aims to enrol about 105 people.
The study is currently expected to finish around December 2026.
The main measurement is taken over: From baselineBaselineYour starting measurements, taken before treatment begins.Read more → to end of intervention (week 8).
From the trial registry
Built from these fields:
- designModule.enrollmentInfo.count
- statusModule.completionDateStruct.date
- outcomesModule.primaryOutcomes[].timeFrame
What the study measures
Change in bloating/distension severity — measured over From baselineBaselineYour starting measurements, taken before treatment begins.Read more → to end of intervention (week 8).
From the trial registry
Built from these fields:
- outcomesModule.primaryOutcomes[].measure
- outcomesModule.primaryOutcomes[].timeFrame
Source: NCT06317441 on ClinicalTrials.gov. The full registry text is further down this page — this summary never replaces it.
Not medical advice. What do these terms mean?
What is being tested — in plain terms
About ProbioticDietary supplement
The intervention consists of a probiotic either with a low or high dosage
From the trial registry — its own words, unedited.
What a dietary supplement is here: A vitamin, mineral, or other supplement being studied.
Read the full explanation → · in clinical review
Common questions
Answered from this trial’s registry record. Where the record doesn’t say, these answers say so rather than filling the gap.
Am I eligible for this trial?
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can decide whether someone can take part. Concord cannot make that determination, and neither can any tool that has not examined you.
What the study lists: an age range of 18 years to 65 years.
The full inclusionInclusion criteriaThe things you must have or be for a study to consider you.Read more → and exclusion criteriaExclusion criteriaThe things that would prevent someone from taking part.Read more → are published on this page, exactly as the study team wrote them.
The useful next step is to bring this trial to your doctor. Answering a few questions first gives them something concrete to review.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.eligibilityCriteria
Is there a placebo?
This study does not list a placeboPlaceboA dummy treatment with no active medicine, used for comparison.Read more → group.
One group receives no study treatment and is followed for comparison.
From the trial registry
- armsInterventionsModule.armGroups[].type
Would I know which treatment I am getting?
You, the study team, the people giving the treatment, and the people analysing the results would all be kept unaware of which group you are in until the study ends.
Which group you would be placed in is decided by chance, like a coin flip — not by you and not by your doctor.
From the trial registry
- designModule.designInfo.maskingInfo.masking
- designModule.designInfo.allocation
Who can join?
The study lists an age range of 18 years to 65 years.
It is open to people of any sex.
It does not accept healthy volunteersHealthy volunteerSomeone without the condition being studied who takes part anyway.Read more →.
Only the trial siteTrial siteA hospital or clinic where a study is actually run.Read more → can confirm whether a particular person can take part.
From the trial registry
- eligibilityModule.minimumAge
- eligibilityModule.maximumAge
- eligibilityModule.sex
- eligibilityModule.healthyVolunteers
How long would this take?
The study's main measurement is taken over: From baselineBaselineYour starting measurements, taken before treatment begins.Read more → to end of intervention (week 8)..
The study as a whole is currently expected to finish around 2026-12.
How long any one person takes part can differ from the study length. The study team can tell you what the schedule looks like in practice.
From the trial registry
- outcomesModule.primaryOutcomes[].timeFrame
- statusModule.completionDateStruct.date
How many people are taking part?
The study aims to enrol about 105 people.
From the trial registry
- designModule.enrollmentInfo.count
Where is this happening?
This study lists one location: Calgary, Alberta, Canada.
Sites can open and close during a study, so confirm with the team before travelling.
From the trial registry
- trial_locations
About This Trial
The goal of this study is to test the effect of a probiotic formulation on gastrointestinal symptoms, gut and small intestine microbiota in participants suffering from small intestinal bacterial overgrowth (SIBO). Two doses of probiotic will be evaluated against placebo.
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See if this trial could fit youThis page is for informational purposes only and does not constitute medical advice. Clinical trial eligibility can only be determined by the trial site after proper screening. Trial information is sourced from ClinicalTrials.gov and may not reflect the most current status. Always consult your healthcare provider before making decisions about clinical trial participation.