Summary
This narrative review by Artemis Simopoulos examines how the modern Western diet, characterised by a markedly elevated omega-6 to omega-3 fatty acid ratio (estimated at 15–20:1 versus an evolutionary ratio closer to 1–4:1), is likely to increase obesity risk. The paper draws on evidence from genetic, cellular, and epidemiological sources to argue that excess linoleic acid (omega-6) promotes fat cell differentiation and lipid storage, whilst omega-3 fatty acids exert opposing effects. The review contributes to an established body of work by Simopoulos linking dietary fatty acid imbalance to chronic disease, including obesity, cardiovascular disease, and inflammation.
UK applicability
The findings are broadly applicable to UK dietary patterns, where omega-6-rich vegetable oils and processed foods are prevalent and omega-3 intake from oily fish and pasture-fed animal products is typically below recommended levels; UK public health guidance on dietary fat composition is directly relevant to this research.
Key measures
Omega-6/omega-3 fatty acid ratio; body mass index (BMI); adipogenesis markers; inflammatory cytokines; dietary fatty acid intake
Outcomes reported
The paper examines the relationship between dietary omega-6/omega-3 fatty acid ratios and obesity risk, likely reviewing evidence from human and animal studies on how excess omega-6 and insufficient omega-3 intake promotes adipogenesis and inflammatory pathways associated with obesity.
Topic tags
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