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Evidence-Based Supplement Research
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Lactobacillus acidophilus L-92 and Improved Gut Health

Research synthesisLow evidenceMixed effect size5 studies · 5 beneficial · 0 neutral · 0 harmful

All 5 studies reported beneficial effects for improved gut health, with 3 showing a moderate effect size and 2 showing a small effect. Only 1 study reached statistical significance. Evidence comes exclusively from animal studies (livestock and pets) and reviews; no human trials or consistent dose/duration data were reported.

  • Studied populations: animals, including poultry, swine, dogs, cats, horses, and ruminants

Caveats: 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. All studies are reviews, not original trials, and most evidence is from animal studies; applicability to human gut health is uncertain.

Generated Jul 11, 2026
5 of 5 papers
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