Best Supplements for Improved Gut Health
Ranked by research evidence. Compare 38 supplements across 58 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Low evidence3 studies
Across 3 studies (all review articles), 3 of 3 report beneficial effects of Bifidobacterium animalis subsp. lactis BB-12 on gut health, with a predominantly moderate effect size. No dose range, population, or study duration information is available from these sources.
- Low evidence3 studies
Across 3 review studies, all reported beneficial effects of Lactobacillus rhamnosus on gut health, with moderate effect sizes in two studies and a small effect in one. The evidence is derived entirely from animal and aquaculture populations, with no human-specific data. Study durations and doses were not consistently reported.
- Very low evidence6 studies
Across 6 studies, all 6 reported beneficial effects on gut health, with effect sizes ranging from small to moderate (predominantly small). The evidence is entirely from review articles and a non-human study, with no original human trials or statistically significant findings available. No consistent dose, duration, or population data were reported.
- Very lowLactobacillus salivarius UCC118Across 6 studies, all 6 reported beneficial effects on gut health, with effect sizes ranging from small to moderate (predominantly small). The evidence is entirely from review articles and a non-human study, with no original human trials or statistically significant findings available. No consistent dose, duration, or population data were reported.6 beneficial6 studies
- Very lowLactobacillus acidophilus L-92Across 5 studies (all reviews), all reported beneficial effects on gut health, with effect sizes ranging from small to moderate. The evidence is predominantly from animal and pet studies, with no consistent dose or duration data available. Only 1 study reported a statistically significant finding.5 beneficial5 studies
- LowBifidobacterium animalis subsp. lactis BB-12Across 3 studies (all review articles), 3 of 3 report beneficial effects of Bifidobacterium animalis subsp. lactis BB-12 on gut health, with a predominantly moderate effect size. No dose range, population, or study duration information is available from these sources.3 beneficial3 studies
- LowLactobacillus rhamnosusAcross 3 review studies, all reported beneficial effects of Lactobacillus rhamnosus on gut health, with moderate effect sizes in two studies and a small effect in one. The evidence is derived entirely from animal and aquaculture populations, with no human-specific data. Study durations and doses were not consistently reported.3 beneficial3 studies
- Very lowKefir CultureAcross 3 studies, all reported beneficial but small-sized effects of Kefir culture on improved gut health. The evidence is based on reviews and one in vitro/in vivo study, with no statistically significant findings reported. Doses, study durations, and populations were not consistently reported, limiting quantitative conclusions.3 beneficial3 studies
- Very lowLactobacillus fermentum HA-179Across 3 studies, all reported beneficial effects of Lactobacillus fermentum HA-179 on gut health, with effect sizes ranging from small to moderate. The evidence is preliminary and based entirely on review articles, with no statistically significant findings reported. No consistent dose, duration, form, or population data were available across studies.3 beneficial3 studies