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Evidence-Based Supplement Research
Evidence-Based Supplement Research

Bifidobacterium plantarum and Improved Gut Microbiota Composition

Research synthesisVery low evidenceMixed effect size3 studies · 3 beneficial · 0 neutral · 0 harmful

Across 3 studies, all reported beneficial effects on gut microbiota composition, with effect sizes ranging from small to moderate. No studies reported neutral or harmful outcomes, though none reached statistical significance. The evidence is preliminary and limited to small samples and review-level analyses, with one systematic review in adults with alcoholic liver disease (n=12) showing moderate beneficial effects on gut microbiota composition.

  • Studied populations: adults with alcoholic liver disease (ALD)

Caveats: Evidence base is small (only 3 studies) — conclusions should be considered preliminary. Available evidence is overwhelmingly positive — clinical literature in this area is subject to publication bias (null-result studies are less likely to be published or indexed). Many of the included studies did not reach statistical significance — effect may be smaller than the predominant direction suggests.

Generated May 12, 2026
6 of 6 papers
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