L. reuteri is the most-studied probiotic for colic, but it produces the most histamine. Here is the trade-off.
L. reuteri DSM 17938 (BioGaia) reduces crying time by 50+ minutes/day in multiple RCTs. It is the only probiotic with strong evidence for infant colic. But it also produces 8,510 ng/mL of histamine.
For most infants, the anti-colic benefit outweighs the histamine risk. But for infants with suspected histamine sensitivity, CMPA, or mast cell issues, the calculus changes. Here is the evidence for every strain.
Based on measured histamine production data from peer-reviewed studies, cross-referenced against the Clarity database of 1,595 validated ingredients and 172 bacterial strains.
| Strain | Rating | Notes |
|---|---|---|
| Lacticaseibacillus rhamnosus | Safe | No significant histamine production detected |
| Lactiplantibacillus plantarum | Safe | No significant histamine production detected |
| Bacillus coagulans | Safe | No significant histamine production detected |
| Limosilactobacillus reuteri | Variable | Strain-dependent. Check specific product strain. |
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Important: "Safe" means no significant histamine production detected for this strain. Individual responses vary. This is not medical advice. Discuss probiotic choices with your healthcare provider.
Each product below has a full ingredient safety report with strain-level analysis.
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View full ingredient safety report
View full ingredient safety report
View full ingredient safety report
View full ingredient safety report
View full ingredient safety report
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