Study Sheds Light On Omega-3 Fatty Acids

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A Finnish study has found that the effects of eicosapentaenoic acid (EPA) — an omega-3 fatty acid found in fish oil — vary greatly between individuals, underscoring the role of individual metabolism in cardiovascular health.

Researchers at the University of Helinski gave 38 healthy adults high doses of EPA and analyzed their blood before, during, and after supplementation. Although EPA was efficiently absorbed and temporarily improved blood lipid profiles — reducing the ability of lipoproteins to stick to artery walls — the responses differed widely among participants. Each person showed a unique “lipid fingerprint” that persisted despite supplementation. The study also found that EPA levels dropped quickly once supplements were stopped, and the strongest effects occurred in those with the lowest initial EPA levels.

While the trial was short-term and didn’t assess long-term health outcomes, it demonstrated that EPA can influence early development of atherosclerosis even in healthy people. The researchers plan to further study EPA’s impact on inflammatory cells and lipid mediators that regulate inflammation.