Understanding EPA: Normal vs Optimal Ranges

?What is EPA?

Eicosapentaenoic acid (EPA) is a long-chain omega-3 fatty acid found primarily in fatty fish, fish oil, and algae. EPA is a precursor to anti-inflammatory eicosanoids (prostaglandins, thromboxanes, leukotrienes of the 3-series) and resolvins that actively resolve inflammation. It is one of the two key marine omega-3s alongside DHA.

!Why It Matters

EPA lowers triglycerides, reduces inflammation, inhibits platelet aggregation, and has demonstrated cardiovascular benefit in high-dose trials (REDUCE-IT). EPA is also studied for depression, where it appears to have mood-stabilising effects superior to DHA alone. EPA weight percentage in red blood cell membranes reflects long-term dietary and supplemental omega-3 intake.

Reference Ranges

Lab normal ranges may vary between laboratories. Optimal and longevity targets are based on research literature and should be interpreted with your physician.

Symptoms of Imbalance

• Low EPA associated with increased inflammation, cardiovascular risk, depression
• Usually no direct symptoms — detected through blood fatty acid profiling

How to Improve Your Levels

• 1Eat fatty fish 2-3 times weekly: salmon, mackerel, sardines, anchovies
• 2Fish oil or algal omega-3 supplements (EPA+DHA, at least 1-2 g/day)
• 3High-dose EPA (4 g/day as icosapent ethyl) under medical supervision for elevated triglycerides

When to Test

As part of omega-3 fatty acid profile; cardiovascular risk assessment; depression evaluation; supplement monitoring.

Related Biomarkers