Research project led by Bailey Hanna, MS, RDN - no affiliate links, ads or sponsored products.
Research probiotics for specific IBS symptoms
Get results in less than 2 minutes
Detail the bowel movement issue you are researching to activate the research tool’s initial filter. Then any secondary symptoms of interest.
See how probiotics compare based on effectiveness for bowel movement issue, as well any secondary symptoms. Further sort by global IBS symptom relief and evidence quality score.
Evaluate products that feature your chosen strain or blend. Shortlist those that transparently disclose ingredients & amounts, can be dosed according to clinical studies, exclusively use RCT-probiotics and are 3rd party tested.
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View Methodology
We analyzed studies conducted in the last 20 years on IBS populations. In total, 69 randomized, placebo-controlled clinical trials have been independently analyzed.
We cover a wide range of probiotics studied in IBS populations, from the well-known to the obscure. In total, 44 probiotic strains & blends have been analyzed so far, across 10 key IBS related symptoms
Our evaluation system produced two independent groups of values: 1) Strength and Direction of Reported Effects on Specific Symptoms, and 2) Quality of Evidence.
Cohen’s d is used to help us understand the magnitude of the difference in IBS symptom scores between those taking probiotics and those not. Cohen’s h helps us understand the difference in the proportion of patients reporting improvement between those taking probiotics and those not.