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

Research synthesisLow evidenceModerate effect5 studies · 5 beneficial · 0 neutral · 0 harmful

Across 5 review studies, all reported beneficial effects of Lactobacillus acidophilus L-92 on gut health, with effect sizes ranging from small to moderate (3 moderate, 2 small). The predominant effect size is moderate. No consistent dose range or study duration was reported across the studies. The evidence is derived from reviews covering animals, pets, and fermented food contexts, not human clinical trials.

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). Additionally, only 1 of the 5 studies reported statistical significance, suggesting the effect may be smaller than the beneficial direction implies. All included studies are reviews rather than primary human trials, which limits the strength of conclusions.

Generated May 12, 2026
5 of 5 papers
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