Omega-6 to Omega-3 Ratio
topic
The omega-6 to omega-3 ratio is the dietary proportion of omega-6 fatty acids (primarily linoleic acid from seed oils and animal fat) to omega-3 fatty acids (EPA and DHA from marine sources, ALA from plant sources) — with the estimated ancestral human ratio of approximately 4:1 having shifted to 15–20:1 in modern industrialized diets, primarily due to the explosion in consumption of refined seed oils (soybean, corn, sunflower, cottonseed) rich in linoleic acid that compete with omega-3 for enzymatic conversion and cell membrane incorporation.
Role
The omega-6 to omega-3 ratio is the most structurally significant dietary shift of the industrialized food era — and one of the most consequential for the inflammation-driven chronic disease epidemic. Every cell membrane in the body reflects the dietary fat composition — with higher omega-6 ratios producing more pro-inflammatory membrane composition and more pro-inflammatory eicosanoid production. The person who cooks with soybean or sunflower oil while taking fish oil supplements is simultaneously worsening and attempting to correct the same fundamental dietary imbalance — without addressing the primary driver.