Type of Dietary Fiber May Shape Children's Developing Gut Microbiome: Study - Video

A new study suggests that different types of dietary fiber may shape the developing gut microbiome in early childhood, potentially influencing gut health and immune responses.

Researchers studied how fibers including xyloglucan, arabinoxylan, pectin and cellulose affected gut microbes using laboratory fermentation experiments, intestinal cell models and observational data from children aged 6 to 36 months. The findings were published in Scientific Reports.

The researchers found that xyloglucan, pectin and arabinoxylan increased production of short-chain fatty acids (SCFAs), which are important compounds produced when gut bacteria ferment fiber and are linked to intestinal and metabolic health.

Xyloglucan and arabinoxylan also appeared to help maintain the intestinal barrier when exposed to an inflammatory challenge. Arabinoxylan produced the clearest improvement, particularly in samples from six-month-old infants.

The researchers also observed changes in the composition of gut bacteria. Xyloglucan and arabinoxylan increased several Bifidobacterium species, while pectin supported the growth of bacteria including F. prausnitzii and P. dorei.

In observational data from 256 children aged 6–36 months, higher dietary pectin intake was associated with greater gut microbial diversity.

A combination of xyloglucan, pectin and cellulose also altered inflammatory signaling in a cellular model, reducing several cytokine responses following exposure to bacterial components.

However, the findings are preliminary. Overall, the research suggests that fiber quality and variety—not just total fiber intake—may matter during early microbiome development. Larger human studies and clinical trials are needed to determine whether eating diverse, fiber-rich foods can produce similar benefits in children.

ORIGINAL: Dogra, S.K., Sprenger, N. & Wang, D. (2026). The impact of dietary fibres on gut microbiome of young children: insights from in vitro experiments and an observational cohort. Scientific Reports, DOI: 10.1038/s41598-026-68854-3