Best Supplements for Improved Gut Health
Ranked by research evidence. Compare 31 supplements across 51 papers from the biomedical literature, with effect direction, evidence strength, and dose range for each.
Top picks by evidence
- Low evidence3 studies
Across 3 review papers, all reported beneficial effects of Bifidobacterium animalis subsp. lactis BB-12 on gut health, with effect sizes ranging from small to moderate (predominantly moderate). However, no study reported statistically significant findings, and all were narrative reviews without primary clinical data. No specific dose or population data were provided.
- Low evidence3 studies
Across 3 review studies, all reported beneficial effects of Lactobacillus rhamnosus on gut health, with effect sizes ranging from small to moderate (2 moderate, 1 small). None of the studies reported statistical significance or specific doses. The evidence is derived from animal and aquaculture populations, not human clinical trials.
- Very low evidence6 studies
Across 6 studies in the database, all 6 report beneficial effects of Lactobacillus salivarius UCC118 on gut health, with effect sizes ranging from small to moderate (predominantly small). The available evidence comes exclusively from review articles and in silico analyses; no human clinical trials with statistical significance testing were identified. Doses and specific populations were not reported in these studies.
- Very lowLactobacillus salivarius UCC118Across 6 studies in the database, all 6 report beneficial effects of Lactobacillus salivarius UCC118 on gut health, with effect sizes ranging from small to moderate (predominantly small). The available evidence comes exclusively from review articles and in silico analyses; no human clinical trials with statistical significance testing were identified. Doses and specific populations were not reported in these studies.6 beneficial6 studies
- Very lowLactobacillus acidophilus L-92Across 5 review studies, all reported beneficial effects on gut health, with effect sizes ranging from small to moderate (2 small, 3 moderate). However, none specifically examined *Lactobacillus acidophilus* L-92 in humans; the evidence is indirect, derived from general probiotic mechanisms and animal populations. Only one study reported a statistically significant finding, and it focused on pets.5 beneficial5 studies
- LowBifidobacterium animalis subsp. lactis BB-12Across 3 review papers, all reported beneficial effects of Bifidobacterium animalis subsp. lactis BB-12 on gut health, with effect sizes ranging from small to moderate (predominantly moderate). However, no study reported statistically significant findings, and all were narrative reviews without primary clinical data. No specific dose or population data were provided.3 beneficial3 studies
- LowLactobacillus rhamnosusAcross 3 review studies, all reported beneficial effects of Lactobacillus rhamnosus on gut health, with effect sizes ranging from small to moderate (2 moderate, 1 small). None of the studies reported statistical significance or specific doses. The evidence is derived from animal and aquaculture populations, not human clinical trials.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. No statistically significant findings were reported, and the evidence is derived entirely from reviews without original trial data. No specific dose range or population was consistently studied.3 beneficial3 studies