Summary
This narrative review by Simopoulos, a leading authority on essential fatty acids, examines the evolutionary basis and contemporary dietary imbalance between omega-6 and omega-3 polyunsaturated fatty acids. The paper likely synthesises epidemiological, clinical, and biochemical evidence indicating that modern Western diets, characterised by omega-6/omega-3 ratios of approximately 15–20:1, are associated with pro-inflammatory states and elevated chronic disease risk compared with the estimated evolutionary ratio of approximately 4:1 or lower. The review underscores the relevance of dietary and agricultural shifts — including the widespread use of omega-6-rich vegetable oils and grain-fed livestock — in driving this imbalance.
UK applicability
The findings are broadly applicable to the UK, where Western dietary patterns similarly reflect elevated omega-6 intakes; the review supports UK public health interest in increasing oily fish consumption, reformulating animal feed to improve meat and dairy fatty acid profiles, and promoting pasture-based livestock systems.
Key measures
Dietary omega-6/omega-3 ratio; plasma fatty acid composition; disease incidence and mortality risk; inflammatory biomarkers
Outcomes reported
The paper examines the health consequences of elevated omega-6/omega-3 ratios in Western diets, likely reporting associations between high ratios and increased risk of cardiovascular disease, inflammatory conditions, and metabolic disorders, alongside evidence that lower ratios are protective.
Topic tags
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