Lactobacillus gasseri
Lactobacillus gasseri is a species naturally found in the human vaginal and gastrointestinal microbiota, and the papers indexed here reflect a broad species-level literature rather than a single defined strain. Observational studies have documented its prevalence in vaginal microbial communities, while in vitro work has characterized antimicrobial activity and the tolerance of some isolates to gut transit conditions such as low pH and bile. Species-level RCT evidence exists, including for oral isolates studied in the context of mastitis, though strain-specific effects vary considerably across the literature. This entry represents L. gasseri as a taxonomic category rather than a characterized commercial strain. These are research topics, not findings; the papers do not establish that this strain treats or prevents any condition.
Where it's been studied Tags come from a conservative keyword scan of each paper's title, abstract, and summary. A tag is research coverage, not measured effect. How we classify this →
Share of this strain's 215 body-system-tagged papers that concern each system. Research coverage, not measured effect.
Symptoms in the research A tag means the paper's text names the symptom or condition — research coverage, not evidence of benefit. How we classify this →
Share of this strain's 99 symptom-tagged papers that mention each symptom or condition. Research coverage, not evidence of benefit.
+14 more symptoms
Strains of this species
8 strains of Lactobacillus gasseri in the index, with 133 linked papers between them.
Lactobacillus gasseri BNR17
Lactobacillus gasseri BNR17, originally isolated from human breast milk, has been studied across multiple research models in the context of metabolic health and body composition.
Lactobacillus gasseri SBT2055
Lactobacillus gasseri SBT2055 (now reclassified as Lactobacillus paragasseri SBT2055) has been studied in human observational and randomized controlled trials.
Lactobacillus gasseri KS-13
Lactobacillus gasseri KS-13 has been studied primarily in combination with other strains, making strain-specific conclusions difficult to draw from the available evidence.
Lactobacillus gasseri OLL2809
Lactobacillus gasseri OLL2809 (reclassified as Lactobacillus paragasseri OLL2809) has been studied across in vitro, animal, and human clinical settings with a focus on immune modulation.
Lactobacillus gasseri CP2305
Lactobacillus gasseri CP2305 has a substantial body of human clinical research for a single probiotic strain, with multiple randomized controlled trials and a meta-analysis in the index.
Lactobacillus gasseri PA 16/8
Lactobacillus gasseri PA 16/8 is best known as one component of the BION 3 multi-strain supplement (together with B.
Lactobacillus gasseri LA806
Lactobacillus gasseri LA806 is a lactic acid bacterial strain studied for probiotic applications.
Lactobacillus gasseri KML39
Lactobacillus gasseri KML39 has a single published study in the current indexed record: a 2025 animal model investigation in which fermented casein containing this strain was examined in a chemically induced colitis mous…
Research Study-type filters use AI-classified labels, audited but not guaranteed — check the paper itself before leaning on one. How we classify this →
303 papers reference this strain in the probiotic database.
Discussion
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Citations
Selected papers that name this strain.
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[1]
PMID 35565662 →Effects of Lactobacillus gasseri CP2305 on Mild Menopausal Symptoms in Middle-Aged Women· Nutrients · 2022
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[2]
PMID 31405122 →Health Benefits of Lactobacillus gasseri CP2305 Tablets in Young Adults Exposed to Chronic Stress: A Randomized, Double-Blind, Placebo-Controlled Study· Nutrients · 2019
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[3]
Source →Daily intake of Lactobacillus gasseri CP2305 relieves fatigue and stress-related symptoms in male university Ekiden runners: A double-blind, randomized, and placebo-controlled clinical trial· Journal of Functional Foods · 2019
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[4]
PMID 29688793 →Lactobacillus gasseri BNR17 Supplementation Reduces the Visceral Fat Accumulation and Waist Circumference in Obese Adults: A Randomized, Double-Blind, Placebo-Controlled Trial· Journal of Medicinal Food · 2018
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[5]
PMID 28768250 →The Ameliorating Effect of Lactobacillus gasseri OLL2716 on Functional Dyspepsia in Helicobacter pylori-Uninfected Individuals: A Randomized Controlled Study· Digestion · 2017
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[6]
PMID 28948675 →Para‐psychobiotic Lactobacillus gasseri CP 2305 ameliorates stress‐related symptoms and sleep quality· Journal of Applied Microbiology · 2017
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[7]
Source →Daily administration of paraprobiotic Lactobacillus gasseri CP2305 ameliorates chronic stress-associated symptoms in Japanese medical students· Journal of Functional Foods · 2017
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[8]
Source →Daily intake of Lactobacillus gasseri CP2305 improves mental, physical, and sleep quality among Japanese medical students enrolled in a cadaver dissection course· Journal of Functional Foods · 2017
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[9]
PMID 26979643 →Regulatory effect of paraprobiotic Lactobacillus gasseri CP2305 on gut environment and function· Microbial Ecology in Health and Disease · 2016
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[10]
PMID 27478434 →Effects of Lactobacillus gasseri OLL2716 on Helicobacter pylori-Associated Dyspepsia: A Multicenter Randomized Double-Blind Controlled Trial· Gastroenterology Research and Practice · 2016