Summary
This 2020 narrative review in Food Science & Nutrition synthesises evidence comparing the omega-3 fatty acid content of grass-fed and conventionally reared beef. The paper reports that grass-fed beef generally contains higher concentrations of omega-3 PUFAs and exhibits a more favourable omega-6:omega-3 ratio than grain-fed beef, though the absolute differences may be modest when considered within the context of total dietary omega-3 intake. The work contributes to the nutritional characterisation of beef from different production systems.
Regional applicability
Findings are directly relevant to UK beef production and consumer choice, given the established grass-fed sector and market positioning of pasture-raised beef. The modest absolute differences noted suggest that dietary omega-3 adequacy depends on broader dietary patterns rather than beef source alone, informing UK nutritional guidance.
Key measures
Omega-3 polyunsaturated fatty acid (PUFA) concentration; omega-6:omega-3 ratio; absolute fatty acid composition in beef muscle tissue
Outcomes reported
The study compared omega-3 fatty acid concentrations and the omega-6:omega-3 ratio in beef from grass-fed versus conventionally (grain-fed) managed cattle. The review synthesised evidence on how livestock feeding systems influence the fatty acid profile and nutritional quality of beef.
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