Skin: strains named in the research

Cutibacterium acnes (formerly Propionibacterium acnes) is a slow-growing bacterium that is a normal resident of human skin, particularly in sebaceous (oil-secreting) follicles.

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 …

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…

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.

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

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

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.

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.

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

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

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.

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

Lacticaseibacillus rhamnosus HN001 (formerly classified as Lactobacillus rhamnosus HN001) has been studied across in vitro, animal, and human randomized controlled trial settings.

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

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.

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…

Bifidobacterium breve M-16V is a well-studied strain with a particular focus on infant and neonatal applications.

Ligilactobacillus salivarius (species-level entry, no specific strain designation) is an oral and intestinal lactic acid bacterium studied across several strains for immune modulation and respiratory health.

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

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…

Lactobacillus crispatus is a lactic acid bacterium native to the human vaginal 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…