Meta-Analysis of Dietary Tannins in Small Ruminant Diets: Effects on Growth Performance, Serum Metabolites, Antioxidant Status, Ruminal Fermentation, Meat Quality, and Fatty Acid Profile
Abstract
Simple Summary Tannins are plant-derived secondary metabolites with both antinutritional and bioactive properties, influencing nutrient metabolism, animals’ performance, and product quality. This meta-analysis of 97 studies assessed the effects of dietary tannin in small ruminants and showed improvements in nutrient intake, nitrogen metabolism, and meat fatty acid profile, including omega-6 and omega-3 fatty acids. However, tannins affected nutrient digestibility, ammonia nitrogen levels, and certain carcass characteristics. Although tannins did not significantly affect productivity or antioxidative status, they proved effective in modulating nitrogen utilization and enhancing meat quality.
How strong is the evidence?
Evidence Hub reads this as a meta-analysis. Its evidence level is 1 of 5 (Highest · pooled evidence). Pooled evidence from several studies sits at the top of the evidence pyramid.
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