Big effect

A meta-analysis of 16 trials linked a probiotic to a large reduction in eczema severity (SMD –4.24) — but the effect was strain-specific and the dose wasn't reported.

This is a strong signal for Lactobacillus GG in children with food allergies, but the analysis relied on indirect comparisons and the results may not generalize to adults or to other strains like Bifidobacterium bifidum BB-06, which was included but not highlighted as the top performer.

Researchers pooled data from 16 randomized trials involving 502 children with food allergies and found that Lactobacillus GG was the most effective probiotic for reducing eczema severity (measured by SCORAD) and improving quality of life. The analysis also examined other strains, including Bifidobacterium bifidum BB-06, but specific effect sizes for those were not reported. Because the study is a network meta-analysis and doses were not specified, the findings need confirmation in direct head-to-head trials.

Where this fits in the evidence

This is among the first studies we've indexed on Bifidobacterium bifidum BB-06 for Improved Allergic Symptoms — treat it as an early signal until more research accumulates.

The study

Lactobacillus GG and other probiotics in pediatric food allergy treatment: a network meta-analysis.

Systematic Review
n = 502
2025-06-03
Frontiers in nutrition

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