Diarrhea

Lactobacillus acidophilus is one of the most studied lactic acid bacteria, with research dating back decades documenting its ability to survive the harsh conditions of the gastrointestinal tract, including acid and bile …

Lacticaseibacillus rhamnosus GG (LGG) is one of the most extensively studied probiotic strains globally, though the papers linked to this strain entry focus primarily on encapsulation technology and formulation stability…

Lactobacillus casei (species-level entry, undesignated strain) is a broadly studied lactic acid bacterium encountered across fermented dairy and non-dairy foods.

Lacticaseibacillus rhamnosus, most widely studied as the GG strain, has an extensive research record, though the evidence base in this index is predominantly in vitro and animal-model work.

Lactiplantibacillus plantarum (formerly Lactobacillus plantarum) is a well-characterized lactic acid bacterium found across fermented foods, the human gut, and diverse environmental niches.

Clostridium butyricum is a spore-forming anaerobic bacterium capable of producing butyric acid through fermentation.

Lacticaseibacillus casei (species-level entry, no specific strain designation) is a broad species grouping that includes well-studied commercial strains such as L.

Bifidobacterium longum is a well-characterized commensal species found throughout the human gut, with a particularly studied role in early-life microbiome establishment.

Bacillus licheniformis is a spore-forming bacterium studied in veterinary and aquaculture applications.

Bacillus clausii is a spore-forming bacterium studied as a potential probiotic organism in research.

Bifidobacterium breve is a species commonly found in the human gut, particularly in breastfed infants, where it plays a role in fermenting complex carbohydrates including human milk oligosaccharides.

Escherichia coli Nissle 1917 (EcN) is a non-pathogenic E.

Bacteroides fragilis is a gram-negative anaerobic bacterium that is a normal constituent of the human gut microbiome, though certain strains, particularly those carrying the B.

Bifidobacterium infantis is an anaerobic bacterium native to the infant gut microbiota.

Limosilactobacillus reuteri DSM 17938 (formerly Lactobacillus reuteri DSM 17938) has been studied in multiple randomized controlled trials and at least one published meta-analysis examining infantile colic, episodes of p…

Bacillus coagulans is a spore-forming bacterium studied as a probiotic candidate, in part because its spores exhibit heat and acid stability, a property studied in relation to survival through food processing and gastric…

Escherichia albertii is a gram-negative enteric bacterium recognized as an emerging enteropathogen — a cause of foodborne diarrheal illness — rather than a probiotic organism.

Saccharomyces boulardii CNCM I-745 is among the most extensively studied probiotic yeasts, with a research base spanning randomized controlled trials, meta-analyses, and animal models.

Bifidobacterium animalis BB-12 is one of the most extensively studied Bifidobacterium strains, with a research record spanning food science, gut physiology, and clinical settings.

Lactobacillus johnsonii is a facultative anaerobic lactic acid bacterium originally isolated from the human vaginal microbiota.

Lacticaseibacillus paracasei (the species, without a designated strain identifier) is a broadly distributed lactic acid bacterium found in fermented foods and the human gut.

Akkermansia muciniphila is a gut bacterium that naturally inhabits the mucus layer lining the intestine and has attracted substantial scientific interest as a potential next-generation probiotic.

Escherichia coli K-12 is a well-studied non-pathogenic laboratory strain of E.

Lactobacillus helveticus is a lactic acid bacterium widely used in dairy fermentation and probiotic applications.