Lipid panel
Arachidonic Acid
LOINC 90916-8 · %
What it is
Arachidonic acid (AA) is an omega-6 fatty acid, reported as a percentage of the fatty acids in your blood. The body uses it to make signalling molecules involved in inflammation.
Why it matters
The amount of AA, especially relative to omega-3s, reflects the balance of your fatty-acid intake and your body's inflammatory signalling tone.
What high values can mean
A higher percentage can reflect a diet heavier in omega-6 relative to omega-3 and a more pro-inflammatory balance.
What low values can mean
A lower percentage is uncommon and usually reflects diet; on its own it is rarely a concern.
How to improve it
Balance is the goal: increasing oily fish and omega-3 intake shifts the ratio rather than eliminating AA, which is an essential nutrient.
Food & lifestyle
Oily fish and omega-3 sources help balance AA; very high intakes of omega-6 vegetable oils and processed foods push it up.
Preparing for the test
Part of a fatty-acid (omega) profile; no fasting is usually required — follow your lab's instructions.
When to talk to a doctor
Interpret with a clinician alongside the rest of your fatty-acid profile rather than in isolation.
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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