Dietary Fatty Acids and Intestinal Health in Pig Systems

Dietary fatty acids are integral to the maintenance and modulation of intestinal health in pig production, serving functions that extend beyond energy provision to include structural, immunological and microbial interactions within the gut. Short-chain fatty acids, derived from microbial fermentation of dietary fibre, act as primary fuel sources for enterocytes and regulate mucosal immunity, while medium-chain fatty acids and their monoglycerides exhibit antimicrobial activity against enteric pathogens and reinforce barrier integrity. Long-chain polyunsaturated fatty acids contribute to membrane fluidity and modulate inflammatory responses through eicosanoid synthesis. Together, these lipid classes influence villus–crypt architecture, tight junction dynamics and the composition of the gut microbiota, thereby affecting nutrient absorption, growth performance and resilience to stressors such as weaning and infection. Advances in feed formulation now harness these bioactive properties to reduce reliance on antibiotics, improve feed efficiency and enhance disease resistance, thus addressing global concerns over antimicrobial stewardship and sustainable livestock production. Integrative strategies combining multiple fatty acid types are increasingly explored to achieve synergistic effects on gut morphology, redox balance and immunomodulation, highlighting the interconnected nature of fatty acid function in porcine intestinal physiology.

Research from Nature Portfolio

Recent studies have demonstrated that dietary supplementation with capric acid mitigates chemically induced small-intestinal dysfunction in pigs by suppressing proinflammatory cytokine production, reducing oxidative stress markers and restoring the expression of tight junction proteins. In porcine epithelial cell models and miniature pigs, capric acid administration improved barrier function, lowered mucosal permeability and enhanced antioxidant enzyme activity, illustrating its potential as a targeted intervention to preserve intestinal integrity under immunosuppressive challenge.

Dietary Fatty Acids and Intestinal Health in Pig Systems publication trend

The graph below shows the total number of articles in dietary fatty acids and intestinal health in pig systems across all publications each year (not limited to Nature Index journals).

Technical terms

Short-chain fatty acids (SCFAs): Fatty acids with fewer than six carbon atoms produced by colonic microbial fermentation, serving as energy substrates and immune regulators.

Medium-chain fatty acids (MCFAs): Fatty acids of six to twelve carbons that are rapidly absorbed and metabolised, exhibiting antimicrobial and immunomodulatory properties.

Long-chain polyunsaturated fatty acids (PUFAs): Essential fatty acids with more than eighteen carbons and multiple double bonds that modulate inflammatory mediators and membrane function.

Gut barrier integrity: The functional capacity of the intestinal lining to restrict pathogen translocation while allowing selective nutrient passage.

Tight junction proteins: Transmembrane proteins, including occludin and claudins, that seal intercellular spaces between epithelial cells.

Villus–crypt architecture: The structural arrangement of epithelial projections (villi) and invaginations (crypts) that facilitate nutrient absorption and cell renewal.

Gut microbiota: The complex community of microorganisms inhabiting the gastrointestinal tract that influences digestion, immunity and metabolism.

References

1. Fatty acids, inflammation and intestinal health in pigs. Journal of Animal Science and Biotechnology (2015).
2. Induction of Porcine Host Defense Peptide Gene Expression by Short-Chain Fatty Acids and Their Analogs. PLOS ONE (2013).
3. Medium-chain fatty acids and monoglycerides as feed additives for pig production: towards gut health improvement and feed pathogen mitigation. Journal of Animal Science and Biotechnology (2020).
4. Function of capric acid in cyclophosphamide-induced intestinal inflammation, oxidative stress, and barrier function in pigs. Scientific Reports (2017).