{"id":"aa-epa-ratio","name":"AA:EPA Ratio","shortName":"AA:EPA","aliases":["Arachidonic Acid/EPA Ratio","Arachidonic Acid:EPA","AA to EPA Ratio","Arachidonic/EPA","ARA:EPA","AA/EPA Ratio","Arachidonic Acid/EPA","Arachidonic acid to EPA ratio"],"abbreviations":["AA:EPA","AA/EPA","ARA:EPA"],"loinc":[{"code":"90909-3","primary":true}],"specimen":"calculated","units":[{"ucum":"{ratio}","display":"ratio"}],"referenceRanges":[{"population":"18+","low":1.1,"high":69.1,"unit":"{ratio}","unitDisplay":"ratio","note":"OmegaQuant's range from dried-blood-spot (whole blood) samples. It was taken from about 75,000 samples run in 2015–2019 from people whose health is unknown, and it covers about 99% of them, not the usual 95%, so it is wide. The sample report prints the upper limit as 69.1 on one page and 69.2 in its table. Plasma, red-cell and other labs' ratios sit on different scales, so use the range printed on your own report.","sources":[{"title":"Omega-3 Index Complete Report (sample report, form 103.004v3)","url":"https://omegaquant.com/wp-content/uploads/2025/06/103.004v3_Omega-3-Index-Complete-Report_03Jun2025.pdf","publisher":"OmegaQuant Analytics","year":2025},{"title":"OmegaQuant FAQ (reference ranges and the ratios included in the profile)","url":"https://omegaquant.com/faq/","publisher":"OmegaQuant Analytics"}]}],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A ratio of arachidonic acid (an omega-6 fat) to EPA (an omega-3 fat) in your blood. A lower ratio means relatively more EPA.","url":"https://bloodtesttracker.com/markers/aa-epa-ratio","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}