Probiotic
Lactobacillus reuteri
Also known as: L. reuteri
Unique probiotic producing reuterin antimicrobial compound. Studied for oral health, colic, and gut-brain effects.
Last reviewed June 2026 · Evidence graded from peer-reviewed research, not editorial opinion. Educational only — not medical advice.
Primary uses
- Oral health
- Infant colic
- H. pylori
- Gut-brain axis
How it works
- Produces reuterin antimicrobial
- Supports oral microbiome
- Gut-brain axis effects
Dosage
- Typical range
- 100 million - 10 billion CFU
- Timing
- Varies by strain
- With food
- Either way
- Duration
- Safe long-term
- Special populations
- Infants (colic), oral health
Forms
- Capsules
- Drops
- Lozenges
Safety
Common side effects
- Minimal
Contraindications
- Severe immunocompromise
Evidence notes
Unique antimicrobial production
Grade B: Some human trials support key claims; further confirmation needed.
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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.