Linoleic Acid (LA)
Lipids marker
Linoleic Acid
Linoleic Acid (LA)
The most abundant dietary omega-6 fatty acid and an essential fat, measured as a percentage of total fatty acids. It is the parent omega-6 from which arachidonic acid can be synthesised, and it typically makes up a large share of the fatty-acid profile.
PED Notes
Linoleic acid is essential and comes from seed oils, nuts, and seeds, so most people have plenty. On a fatty-acid panel it is usually one of the largest fractions. Contrary to the simple omega-6-is-bad narrative, higher circulating linoleic acid is generally associated with neutral-to-favourable cardiometabolic outcomes; the pro-inflammatory concern applies more to the downstream omega-6 to omega-3 balance than to linoleic acid itself. For enhanced athletes the practical point is simply to keep the overall omega-6 to omega-3 ratio in check by ensuring adequate EPA/DHA, rather than fixating on linoleic acid. Values are matrix and method dependent.
Interpreting linoleic acid:
- A very low linoleic acid is uncommon on a typical diet and would suggest a very-low-fat intake; ensure adequate essential fat intake from nuts, seeds, and vegetable oils.
- A high linoleic acid is not itself a clear risk; focus on the omega-6 to omega-3 ratio. If that ratio is elevated, raise EPA/DHA (fish oil 2-3g/day, oily fish) rather than trying to slash an essential fatty acid.
- Recheck the fatty-acid panel and the omega-6/omega-3 ratio after dietary changes.
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Frequently Asked Questions
Reference Ranges
Standard Range
VitalMetrics Range