Dietary Fiber Modulation of Gut Microbiota Dynamics
Summary
Dietary fibres encompass a diverse array of non-digestible carbohydrates that escape host enzymatic breakdown and serve as substrates for gut microorganisms. Their physicochemical properties—such as solubility, degree of polymerisation and branching—determine microbial access and fermentability. Through selective enrichment of fibre-degrading taxa, these substrates drive shifts in community structure, promoting taxa that yield beneficial metabolites such as short-chain fatty acids (SCFAs). SCFAs regulate gut barrier integrity, mucosal immunity and host energy metabolism, while microbial cross-feeding networks ensure a balanced ecosystem. Variations in fibre type and intake are linked to changes in microbial diversity, resilience against perturbations and susceptibility to disorders including obesity, inflammatory bowel disease and metabolic syndrome. Understanding how distinct fibres influence microbial species at the strain level is crucial for rationalising dietary recommendations and developing targeted nutritional interventions. Global trends towards low-fibre diets in urbanised societies underscore the importance of restoring microbial diversity through personalised fibre prescriptions, with implications for public health and preventive medicine.
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Dietary Fiber Modulation of Gut Microbiota Dynamics publication trend
The graph below shows the total number of articles in dietary fiber modulation of gut microbiota dynamics across all publications each year (not limited to Nature Index journals).
Technical terms
Prebiotic: A substrate selectively utilised by host microorganisms conferring health benefits.
Short-chain fatty acids (SCFAs): Acetate, propionate and butyrate produced by microbial fermentation, essential for colonic health and metabolic regulation.
Fermentability: The extent and rate at which microbial consortia convert dietary substrates into metabolic end-products.
Degree of methyl-esterification: The proportion of galacturonic acid residues in pectin bearing methyl groups, influencing solubility and microbial accessibility.
Dysbiosis: A disturbed microbial community composition associated with disease states.
References
- Effects of pectin methyl-esterification on intestinal microbiota and its immunomodulatory properties in naive mice. Carbohydrate Polymers (2024).
- Potential of Pectins to Beneficially Modulate the Gut Microbiota Depends on Their Structural Properties. Frontiers in Microbiology (2019).
- Dietary Fibre Modulates the Gut Microbiota. Nutrients (2021).
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