The percentage of EPA + DHA in red blood cell membranes.
What is it
The Omega-3 Index measures the percentage of EPA + DHA (the two main omega-3 fatty acids) in red blood cell membranes. It is considered a stable, integrated marker of long-term omega-3 status.
Why it's measured
The Omega-3 Index has been associated with cardiovascular outcomes in published research, with higher values generally considered more favorable.
Reference range
Standard laboratory reference
> 8 %
Reference ranges vary by laboratory. Your individual reference range will appear on your test report and should be interpreted by your physician in the context of your overall health profile.
What results may indicate
Elevated
Generally considered favorable in research on cardiovascular and cognitive health.
Lower
Has been associated with reduced cardiovascular and cognitive protection in research literature.
These associations are general. They are not a personal diagnosis or prediction. Discuss your individual results with your physician in the context of your full health profile.
When it's measured
Often measured in cardiovascular and longevity-focused panels.
Related markers
Measured in
A complete look at your heart, hormones, metabolism, inflammation, and longevity systems — drawn at Quest or LabCorp, reviewed by a U.S.-licensed physician.
Explore the Apex Panel →This information is for general educational purposes only and is not medical advice. Lab results alone are not intended to diagnose, treat, or cure any condition and do not replace the advice of a healthcare provider. OPTML does not offer medical advice, a diagnosis, medical treatment, or any form of medical opinion.