Summary
This 2010 narrative review by Daley et al., published in Nutrition Journal, synthesises peer-reviewed literature on the nutritional composition of grass-fed versus grain-fed beef. The authors conclude that grass-fed beef tends to exhibit a more favourable fatty acid profile with higher omega-3 and CLA concentrations, alongside greater vitamin E levels, which may have implications for human dietary health. The review contextualises these compositional differences within broader discussions of livestock production systems and food quality.
Regional applicability
The findings are relevant to UK livestock policy and consumer choice, particularly given the established pasture-based beef sector in the United Kingdom. However, the review likely draws predominantly on North American data, so direct applicability to UK grass-fed systems and seasonal pasture regimes should be assessed cautiously.
Key measures
Omega-3 polyunsaturated fatty acids (PUFA), conjugated linoleic acid (CLA), vitamin E (α-tocopherol), fatty acid profile composition
Outcomes reported
The narrative review synthesised existing literature comparing the fatty acid and micronutrient profiles of grass-fed versus grain-fed beef. The authors assessed differences in omega-3 polyunsaturated fatty acids, conjugated linoleic acid (CLA), and vitamin E concentrations between the two production systems.
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