A probiotic trial found changes in immune markers
Researchers tested a specific bacterial strain in healthy adults and reported changes in immune measurements, alongside separate laboratory and animal safety assessments.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
The tested probiotic increased several immune markers compared with placebo. Uric acid and LDL cholesterol also decreased, but those comparisons were with participants' starting values. These findings describe laboratory measurements; the abstract does not report fewer infections or other clinical benefits. Its safety assessments also cannot establish safety for every user or duration.
The trial was small and short. The abstract does not provide the size of the immune-marker differences, placebo comparisons for the metabolic changes, or clinical adverse-event rates.
What researchers found
Salivary IgA
After 8 weeks, salivary IgA was higher with the probiotic than placebo (p = 0.039); the size of the difference is not reported.
The comparator matters
A reduction from baseline describes change within the probiotic group. Without the corresponding placebo comparison, the uric acid and cholesterol results do not establish an additional effect of supplementation over the control condition.
What safety testing covered
Genomic screening found none of the specified genes related to pathogenicity, antibiotic resistance or biogenic amine synthesis. Laboratory and animal tests also supported safety, but these assessments do not establish long-term safety in people.
The original publication
Safety and immune-regulating effects of Limosilactobacillus reuteri LR08: Preclinical and clinical evidence from a randomized controlled trial.
Han M, Xu F, Dong Y et al.
Clin Nutr · 2026
- PubMed ID
- 41650801
- Record checked
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