Dietary Fiber Effects on Gut Health
Summary
Dietary fibre encompasses a diverse array of non-digestible carbohydrates, including soluble and insoluble forms, that traverse the gastrointestinal tract largely intact. In the colon, fermentable fibres serve as substrates for resident microbes, yielding metabolites—most notably short-chain fatty acids—that nourish epithelial cells, reinforce the mucosal barrier and modulate immune tone. Insoluble fibres enhance stool bulk and transit, alleviating constipation and mitigating exposure of the mucosa to potential toxins. Together, these actions shape microbial composition, promote barrier integrity, attenuate inflammation and influence systemic health endpoints ranging from metabolic regulation to immune resilience.
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Dietary Fiber Effects on Gut Health publication trend
The graph below shows the total number of articles in dietary fiber effects on gut health across all publications each year (not limited to Nature Index journals).
Technical terms
Short-chain fatty acids (SCFAs): Organic acids (e.g. acetate, propionate, butyrate) produced by microbial fermentation of fibre, which support colonocyte energy metabolism and regulate immune responses.
Gut microbiota: The complex community of bacteria, archaea, viruses and fungi that inhabit the gastrointestinal tract and influence digestion, immunity and host metabolism.
Prebiotic: A selectively fermented ingredient that induces specific changes in microbiota composition or activity, conferring health benefits on the host.
Dysbiosis: A disruption or imbalance in the normal microbial community structure associated with impaired barrier function and inflammation.
Mucus layer: The protective gel of mucin glycoproteins lining the colon, which separates microbes from the epithelium and aids in barrier defence.
References
- Partially hydrolyzed guar gum increased colonic mucus layer in mice via succinate-mediated MUC2 production. npj Science of Food (2023).
- Partially hydrolyzed guar gum attenuates broad-spectrum antibiotic-induced gut microbiota disruption associated with intestinal inflammation and barrier damage in mice. Food Bioscience (2024).
- Metabolic response of intestinal microbiota to guar gum consumption. Frontiers in Nutrition (2023).
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