Dietary Resistant Starch Effects on Gut Health in Swine

Dietary resistant starch (RS) comprises the fraction of starch that escapes digestion in the small intestine and undergoes microbial fermentation in the hindgut of swine. During fermentation, RS is converted into short-chain fatty acids (SCFAs), notably acetate, propionate and butyrate, which serve as energy substrates for colonocytes and play pivotal roles in maintaining intestinal integrity. The production of SCFAs not only fosters epithelial cell proliferation and mucosal barrier function but also modulates the composition and activity of the gut microbiota, often selectively promoting beneficial taxa such as Ruminococcus and Coprococcus. These microbial and metabolic changes have been linked to enhanced immune regulation, reduced proliferation of pathogenic bacteria and improved gut morphometry. Although RS can contribute to prebiotic effects and mitigate post-weaning diarrhoea, its lower energy yield compared with digestible starch necessitates careful dietary formulation. The type and quantity of RS interact with the endogenous enzymatic machinery and microbial communities, influencing feed efficiency, nutrient absorption and overall growth performance. Integrating RS into swine diets therefore presents both opportunities for gut health management and challenges in balancing energy supply and productive outcomes.

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Dietary Resistant Starch Effects on Gut Health in Swine publication trend

The graph below shows the total number of articles in dietary resistant starch effects on gut health in swine across all publications each year (not limited to Nature Index journals).

Technical terms

Resistant starch (RS): The portion of dietary starch that resists enzymatic breakdown in the small intestine and reaches the colon for microbial fermentation.

Short-chain fatty acids (SCFAs): Metabolic end-products of microbial fermentation of RS, including acetate, propionate and butyrate, which support intestinal energy supply and barrier function.

Gut microbiota: The diverse community of microorganisms residing throughout the gastrointestinal tract that influences host digestion, metabolism and immune homeostasis.

Enterocytes: Absorptive epithelial cells lining the small and large intestine that mediate nutrient uptake and contribute to barrier integrity.

References

1. Resistant starch: Implications of dietary inclusion on gut health and growth in pigs: a review. Journal of Animal Science and Biotechnology (2021).
2. Dietary Resistant Potato Starch Alters Intestinal Microbial Communities and Their Metabolites, and Markers of Immune Regulation and Barrier Function in Swine. Frontiers in Immunology (2019).
3. Microbiome-Metabolome Responses in the Cecum and Colon of Pig to a High Resistant Starch Diet. Frontiers in Microbiology (2016).