Eczema

A gut-immune connection that starts before birth

Eczema, or atopic dermatitis, is one of the most common chronic skin conditions in children, and its rise over recent decades has been linked to factors that disrupt early gut bacteria, including increased Caesarean births, antibiotic use, and lower-fibre diets. A meta-analysis of 8 randomised controlled trials, covering 2,575 infants, found that probiotic supplementation during pregnancy and early infancy reduced the risk of childhood eczema by 14% compared with placebo.

Source: Association of Probiotics with Atopic Dermatitis among Infant: A Meta-analysis of Randomized Controlled Trials

The benefit doesn't extend to every type of eczema

This protective effect wasn't universal. The same meta-analysis found no significant benefit for the specific subtype of eczema linked to elevated IgE, an antibody involved in classic allergic reactions, meaning probiotics appear to help with eczema broadly without necessarily preventing the more allergy-driven form. A separate long-term study following children given a specific strain, Lactobacillus rhamnosus HN001, found the reduction in eczema was still measurable at 6 years of age, a genuinely durable effect rather than a short-term one.

Source: The effect of probiotics in the prevention of atopic dermatitis in children: a systematic review and meta-analysis

As with any probiotic, this protective effect depends on the bacteria establishing themselves properly, not just being swallowed. A strain given during pregnancy or infancy still needs an ongoing supply of fibre and food compounds, both from the mother and later the growing child's own diet, to keep working rather than dying back out.

What this means for you

Eczema needs proper diagnosis and, when needed, treatment with moisturisers, topical steroids, or other prescribed treatments, since the skin barrier itself needs direct care regardless of any gut-related cause. For pregnant women and parents of young infants, the trial evidence above is a reasonable basis for discussing a specific, well-studied probiotic strain with a doctor, particularly if there's a family history of eczema or allergic disease. A varied, plant-rich diet during pregnancy and, once appropriate, in early childhood supports the same gut bacteria this research ties to lower eczema risk. That's the same idea behind GutLab, everyday gut health starts with regularly feeding the microbiome a broad range of plant-rich ingredients.