Lipid panel
Arachidonic Acid/EPA Ratio
LOINC 90909-3 · ratio
What it is
This ratio compares arachidonic acid (an omega-6) to EPA (an omega-3). It summarises the balance between pro- and anti-inflammatory fatty acids in your blood.
Why it matters
It is a compact snapshot of your omega-6 to omega-3 balance, which research links to inflammatory tone and long-term heart health.
What high values can mean
A higher ratio suggests more omega-6 relative to omega-3 — a balance often described as more pro-inflammatory.
What low values can mean
A lower ratio suggests relatively more omega-3, a balance generally regarded as favourable.
How to improve it
Eating more oily fish or taking omega-3 (under guidance) typically lowers the ratio; reducing excess omega-6 oils also helps.
Food & lifestyle
Salmon, sardines, mackerel and other oily fish lower the ratio; heavy use of omega-6 vegetable oils and fried foods raises it.
Preparing for the test
Part of a fatty-acid (omega) profile; fasting is usually not required — follow your lab's instructions.
When to talk to a doctor
Best interpreted with a clinician as a trend over time rather than from a single reading.
Related markers
Sources
- NIH Office of Dietary Supplements
- Testing.com (AACC)
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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