What it measures
The total of all the omega-6 fats measured in the sample, such as linoleic acid and arachidonic acid, as a percentage of all the fatty acids measured. Omega-6 fats come mainly from vegetable oils, nuts and seeds, with arachidonic acid also found in meat and eggs.
Why people test it
- Reported alongside total omega-3 to give the omega-6 to omega-3 ratio.
- Looked at by people tracking the balance of fats in their diet.
- Part of a wider fatty acid profile.
Typical range
There is no single agreed range. Ranges vary by lab, method (red cells, whole blood or plasma), age and sex, and your report shows the lab's own range.
Finger-prick or vein?
A finger-prick sample is usually fine, as fatty acid tests are often run on dried blood spots. Vein draws are offered too.