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

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

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 …

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

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.

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.

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.

Lactobacillus brevis is a heterofermentative lactic acid bacterium widely distributed in fermented food environments.

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

Lactobacillus delbrueckii is a lactic acid bacterium widely used in yogurt fermentation and industrial applications.

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…

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.

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

Bacillus amyloliquefaciens is a spore-forming soil bacterium known primarily for its enzyme-producing capabilities and agricultural biocontrol applications — including suppression of plant pathogens and promotion of plan…

Faecalibacterium prausnitzii is a butyrate-producing commensal bacterium that is among the most abundant in a healthy human gut and has attracted significant research interest as a potential next-generation probiotic.

Lactobacillus acidophilus LA-5 is a commercially used probiotic strain studied primarily for its survivability in fermented food matrices such as yogurt, cheese, and whey-based beverages.

Limosilactobacillus fermentum CECT5716 (previously classified as Lactobacillus fermentum CECT5716) was originally isolated from human breast milk, an origin that has shaped much of the research into its applications.

Eubacterium rectale is a gram-positive, obligate anaerobe and prominent butyrate-producing member of the human gut microbiota, where it is typically one of the more abundant bacterial species.

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…

Lactobacillus casei Shirota is one of the most extensively studied probiotic strains, with a research history spanning several decades.

Lactobacillus fermentum (species-level entry, no specific strain designation) is a heterofermentative lactic acid bacterium found in fermented foods and the human gastrointestinal tract.

Bacillus subtilis is a Gram-positive, rod-shaped bacterium widely distributed in soil and food environments, including fermented products.

Bacillus velezensis (species-level, undesignated strain) is a spore-forming soil bacterium studied primarily for agricultural biocontrol applications, including antifungal and antibacterial activity against crop pathogen…