Probiotic
Bifidobacterium longum
Also known as: B. longum, B. longum 1714, Bifido
Dominant infant gut bacteria that supports immune function and may reduce anxiety. Important throughout life.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Immune support
- Anxiety/mood
- Gut health
- Inflammation
How it works
- Immune modulation
- GABA production
- Anti-inflammatory
Dosage
- Typical range
- 1-10 billion CFU daily
- Timing
- Any time
- With food
- Either way
- Duration
- Safe long-term
- Special populations
- Stress, immune support
Forms
- Capsules
Safety
Common side effects
- Minimal
Contraindications
- Severe immunocompromise
Products containing Bifidobacterium longum
Top-scoring supplements in our catalog that list Bifidobacterium longum on the label. Each product is graded on Formulate's ingredient-level rubric — dose accuracy, form, transparency, and third-party testing.
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Evidence notes
Important from infancy through aging
Grade B: Some human trials support key claims; further confirmation needed.
Cited research for Bifidobacterium longum
Clinical studies referenced across Formulate guides that mention bifidobacterium longum. Each links to the full study page with PubMed source + the guides that cite it.
Related in Probiotic
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Medical disclaimer. This page is educational and does not replace advice from a qualified healthcare provider. Individual needs and risks vary — consult a professional before starting, stopping, or combining supplements, especially if you are pregnant or nursing, taking medication, or managing a health condition.