Tannin-Based Nutritional Interventions in Intestinal Health
Summary
Tannins are a class of plant-derived polyphenolic compounds that have long been recognised for their capacity to modulate digestive physiology and host–microbe interactions. Recent work has illuminated their dual role as both antinutritional factors at high inclusion levels and bioactive agents that can enhance intestinal barrier function, regulate inflammatory signalling and shape microbial ecosystems. Hydrolysable and condensed tannins, distinguished by their chemical linkages and molecular size, exhibit distinct patterns of absorption and metabolism within the gastrointestinal tract. By reinforcing tight junction integrity, scavenging reactive oxygen species and selectively inhibiting pathogenic bacteria, tannin-based supplements have emerged as promising alternatives to conventional antimicrobials in both human and animal models. Growing evidence indicates that judicious formulation of tannin blends or encapsulation strategies can maximise health benefits while minimising adverse effects on nutrient digestibility. The global push to reduce antibiotic usage, coupled with rising interest in sustainable and natural feed additives, has elevated tannins to a platform of considerable practical importance across livestock production, paediatric nutrition and emerging functional foods.
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Tannin-Based Nutritional Interventions in Intestinal Health publication trend
The graph below shows the total number of articles in tannin-based nutritional interventions in intestinal health across all publications each year (not limited to Nature Index journals).
Technical terms
Tannins: Polyphenolic compounds from plants divided into hydrolysable and condensed subtypes, capable of binding proteins and modulating microbial growth.
Hydrolysable tannins: Tannins composed of gallic or ellagic acid esters susceptible to enzymatic cleavage in the gut.
Condensed tannins: Polymers of flavan-3-ols that resist hydrolysis and may interact with dietary proteins and microbial cell walls.
Gut microbiota: The community of bacteria, archaea and fungi inhabiting the gastrointestinal tract, influential in digestion, immunity and metabolism.
Intestinal barrier integrity: The combined function of epithelial cells, tight junction complexes and mucus layer that prevents pathogen translocation and maintains homeostasis.
References
- Comparison of the Effects between Tannins Extracted from Different Natural Plants on Growth Performance, Antioxidant Capacity, Immunity, and Intestinal Flora of Broiler Chickens. Antioxidants (2023).
- Tannic acid prevents post-weaning diarrhea by improving intestinal barrier integrity and function in weaned piglets. Journal of Animal Science and Biotechnology (2020).
- Review: Chestnut and quebracho tannins in pig nutrition: the effects on performance and intestinal health. Animal (2020).
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