Gut check: new probiotic study targets constipation in active adults
NCT ID NCT07388264
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study tests whether a daily probiotic supplement (Weizmannia coagulans) can reduce constipation and improve gut health in healthy, physically active adults aged 18 to 50. About 30 participants will take the probiotic or a placebo for 4 weeks each, with a break in between, and report their symptoms. The goal is to see if this probiotic offers real relief for common digestive issues.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 30 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Jun 2025
- Expected to finish
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Jun 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 50 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria Ages of 18 - 50 years Average daily bloating score \>5 on question 3 of the Modified daily Abdominal, Gas, and Bloating Questionnaire and/or bloating for \>5 days during the past 14 days Body mass index (BMI) 18.5 - 29.9 kg/m2 (Inclusive) (Individuals \>29.9 kg/m2, but \<25% fat for men and \<30% fat for women will be accepted into the study. The cohort average of body mass index will not exceed 29.9 kg/m2) Weight stable for the past three months (defined as less than a 5% variation in body mass over this time) Determined to be healthy through completion of a health history questionnaire Subject agrees to maintain their existing dietary patterns throughout the study period and to report to study investigators any changes particularly as they relate to probiotic-containing or fermented foods Subject agrees to refrain from alcohol, caffeine, and strenuous exercise for 24 hours prior to each test day. Minimum baseline physical activity level (defined as at least 30 minutes of moderate intensity exercise at least 4 days per week for the past 3 months) Subject is willing and able to comply with the study protocol. Study participant is not currently enrolled in another clinical trial that involves the administration of some investigative agent Subject has given voluntary, written, informed consent to participate in the study. Exclusion Criteria Positive medical history and/or is currently being treated for some form of heart disease, cardiovascular disease Currently being treated for kidney disease, renal failure, or has dialysis performed on regular intervals Has liver disease or some form of clinically diagnosed hepatic impairment Diagnosed with having Type I or Type II diabetes (determined as fasting blood glucose \> 126 mg/dL) Diagnosed with or is being treated for some form of thyroid disease Diagnosed with major affective disorder or other psychiatric disorder that required hospitalization in the prior year Diagnosed with some form of immune disorder (i.e., HIV/AIDS) History of cancer (except localized skin cancer without metastases or in situ cervical cancer within 5 years prior to screening visit). Participant has an abnormality or obstruction of the gastrointestinal tract precluding swallowing (e.g., dysphagia) and digestion (e.g., known intestinal malabsorption, celiac disease, inflammatory bowel disease, chronic pancreatitis, steatorrhea) Participant has been treated for a gastrointestinal related disorder, complication, or disorder within the past 30 days Positive medical history for any neurological condition or neurological disease Diagnosed with or being treated for any endocrinological disorder or currently used any form of hormone replacement (prescribed/doctor ordered or not) Women with a history of hormone-related conditions such as endometriosis, fibroids, polycystic ovary syndrome Currently prescribed for the first time statin drugs (i.e., Lipitor, Livalo, Crestor, Zocor, etc.) within the past 6 months or has had their dosage or medication changed within the past 6 months Currently prescribed for the first time hypertension medication (i.e., Beta-blockers, ACE Inhibitors, Alpha blockers, Vasodilators, etc.) within the past 6 months or has had their dosage or medication changed within the past 6 months Current antibiotic use or other prescription or over-the-counter medications that may impact study outcomes Have a known sensitivity or allergy to any of the study products Blood donation in past 60 days Current smoker (average of \> 1 pack per week within the past 3 months) or has quit within the past six months. This includes all forms of nicotine They plan major changes in lifestyle (i.e., diet, dieting, exercise level, travel, etc.) during the study Competitive athletes will be excluded History of alcohol or substance abuse in the 12 months prior to screening Current use of anabolic steroids (medically prescribed or otherwise) Receipt or use of an investigational product in another research study within 30 days of beginning the study protocol Report taking a probiotic or other dietary supplement know to impact digestion or gut function in the past 30 days Recent history (\<3 months) of exercise training or weight loss (\> 5%) Currently following a ketogenic or low carbohydrate diet within the past 30 days. Women who are pregnant, planning to become pregnant, or lactating currently or within the past six months Any condition or abnormality that, in the opinion of the investigator, would compromise the safety of the participant or the quality of the study data
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Lindenwood University
RECRUITINGSaint Charles, Missouri, 63301, United States
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