Summary
This narrative review synthesises current understanding of tannin metabolism and effects in ruminant systems, emphasising the dose- and source-dependent nature of both adverse and beneficial outcomes. The authors examine mechanisms by which condensed and hydrolysable tannins interact with ruminal fermentation and protein metabolism, and discuss emerging evidence for methane mitigation and anthelmintic potential. The work underscores the necessity for characterising tannin type, concentration, and plant source when assessing their net impact on animal nutrition and health.
UK applicability
The findings are directly relevant to UK ruminant systems, particularly organic and extensive pasture-based operations where tannin-rich forage legumes (birdsfoot trefoil, sainfoin) are increasingly adopted. The review's discussion of methane mitigation and parasite control aligns with UK sustainability targets and interest in reducing anthelmintic dependency.
Key measures
Feed intake, digestibility coefficients, ruminal fermentation parameters, methane emissions, parasite burden, animal growth performance, protein bioavailability
Outcomes reported
This review synthesises evidence on how dietary tannins affect ruminant feed digestion, ruminal fermentation patterns, nutrient bioavailability, and animal performance metrics. The authors examine both adverse effects (reduced intake and digestibility) and potential benefits (methane reduction, parasite control) across different tannin types and concentrations.
Topic tags
Dig deeper with Pulse AI.
Pulse AI has read the whole catalogue. Ask about this record, its theme, or how the findings apply to UK farming and policy — every answer cites the underlying studies.