Lactobacillus reuteri — answers to L. reuteri
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A specific strain of probiotic bacteria naturally found in the human gut, cultured and freeze-dried for use in supplements.
Why it’s used
Taken to support digestive health and, in infants, to ease colic symptoms.
What the evidence is for
reducing crying time in breastfed infants with colic.
What the evidence says
A meta-analysis published in JAMA Pediatrics found that Lactobacillus reuteri supplementation reduced crying time in breastfed infants with colic compared with placebo, though effects in formula-fed infants were less consistent. Evidence for broader adult digestive or immune claims is more limited and strain- and dose-dependent, since probiotic effects do not generalize across all Lactobacillus species.
Context
Infant colic trials generally used specific proprietary strains (such as DSM 17938) given as drops over several weeks; findings for one strain and preparation do not necessarily apply to others sold under the same species name.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.