The Omega-3 Index Plus Test measures fatty acid levels in the blood and reports omega-3, omega-6 and trans fat blood levels. Studies show that the desirable range for the Omega- 6:Omega-3 ratio is 3:1-5:1. The ideal range for the AA:EPA ratio is 2.5:1-11:1. https://omegaquant.com/omega-3-index-plus/