Summary
This study by Ponnampalam et al. (2014), published in Meat Science, examines how finishing system — pasture versus grain-fed feedlot — affects the nutritional composition of beef, with particular focus on fatty acid profiles. Pasture-fed beef is generally expected to show more favourable omega-6:omega-3 ratios and higher CLA and omega-3 concentrations relative to grain-fed counterparts, though grain-feeding tends to increase intramuscular fat. The paper contributes to the evidence base on how livestock feeding regimes influence the nutritional quality of beef as a food commodity.
UK applicability
Although conducted in an Australian context, the findings are broadly applicable to UK conditions, where debates around pasture-fed versus intensively finished beef are directly relevant to consumer health claims, Red Tractor standards, and the growing pasture-for-life certification movement.
Key measures
Fatty acid composition (g/100g fat); omega-3 fatty acid content (mg/100g); omega-6:omega-3 ratio; conjugated linoleic acid (CLA) concentration; intramuscular fat percentage
Outcomes reported
The study compared the fatty acid profiles, including omega-3 and omega-6 content, and other nutritional attributes of beef from cattle raised on pasture versus grain-based feedlot systems. It likely reported differences in polyunsaturated fatty acid ratios, conjugated linoleic acid (CLA) concentrations, and intramuscular fat content between the two production systems.
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