Understanding EPA, DPA & DHA: Normal vs Optimal Ranges

?What is EPA, DPA & DHA?

EPA (eicosapentaenoic acid), DPA (docosapentaenoic acid), and DHA (docosahexaenoic acid) are long-chain omega-3 polyunsaturated fatty acids found primarily in marine sources such as fatty fish and algae. These bioactive lipids play crucial roles in cardiovascular health, cognitive function, and inflammatory regulation throughout the body.

!Why It Matters

Adequate levels of EPA, DPA, and DHA may support heart health, brain function, and balanced immune response. Low levels can be associated with increased cardiovascular risk, cognitive decline, and suboptimal mood regulation. These markers reflect your omega-3 status and dietary intake patterns, helping guide nutritional optimization.

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

• Brain fog or difficulty concentrating
• Mood changes or low mood
• Joint stiffness or muscle aches
• Dry skin or hair
• Poor wound healing

How to Improve Your Levels

• 1Increase intake of fatty fish such as salmon, mackerel, sardines, or anchovies 2–3 times weekly
• 2Consider algae-based omega-3 supplements (especially for vegetarians/vegans)
• 3Include ground flaxseeds, chia seeds, or walnuts as plant-based omega-3 sources
• 4Reduce intake of vegetable oils high in omega-6 to improve the omega-3 to omega-6 ratio
• 5Limit processed foods and fried foods that can displace omega-3-rich options
• 6Consult a healthcare provider about fish oil or algal oil supplementation based on your results

When to Test

Consider testing if you have cardiovascular concerns, cognitive symptoms, inflammatory conditions, mood disturbances, or follow a vegetarian/vegan diet. Baseline testing is useful for anyone seeking to optimize their nutritional profile.

Related Biomarkers