Bifidobacterium longum — answers to B. longum (a probiotic strain)
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A species of Bifidobacterium bacteria naturally found in the human gut, sold as a live-culture probiotic ingredient.
Why it’s used
Taken to support digestive comfort and gut microbiota balance, and sometimes marketed for stress- or mood-related outcomes.
What the evidence says
Some specific B. longum strains have been studied for effects on gut symptoms and, in smaller trials, on stress-related measures, with mixed and strain-specific results. As with other probiotics, the NIH notes that findings for one strain do not generalize to all products labeled with the same species name.
Context
Clinical trials report dosing in colony-forming units, typically in the billions per day, rather than in a mass unit; study duration is usually several weeks.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.