Lactobacillus casei — answers to L. casei probiotic
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Lactobacillus casei is a species of bacteria used as a probiotic, added to supplements and fermented foods such as some yogurts.
Why it’s used
Taken to support digestive and gut health.
What the evidence is for
strain-specific effects on certain digestive symptoms.
What the evidence says
Effects of probiotics are strain- and dose-specific, and evidence varies considerably by the particular L. casei strain and product studied. Some clinical trials of specific strains show modest effects on outcomes like diarrhea duration or gut symptoms, but findings do not generalize automatically to every product labeled L. casei, and NIH's Office of Dietary Supplements notes that probiotic evidence overall is strain-dependent and mixed.
Context
Clinical trials of L. casei strains have used varying colony-forming-unit doses and durations, with no dose expressed in a comparable mass unit across studies, limiting direct comparison.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.