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.
Where does your number land?
—
Drag to your own Omega-3 Index result.
Educational only, not a diagnosis. Ranges vary by laboratory. See which panel includes Omega-3 Index.
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.
Find the right 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.
OPTML offers compounded semaglutide and tirzepatide, prescribed and overseen by U.S.-licensed physicians. Compounded drug products are not approved or evaluated for safety, effectiveness, or quality by the FDA. OPTML is not associated with, endorsed by, or affiliated with the manufacturers of FDA-approved branded weight-loss medications, and does not sell or supply those branded products. Anyone interested in an FDA-approved branded medication should consult a licensed healthcare provider or pharmacist. Individual results vary; no specific result is promised, and weight management requires ongoing medical guidance.
The whole picture in one sitting: who it suits, what the labs decide, what the first year actually looks like. Every clinical claim is cited.
How to protect lean mass while losing weight on a GLP-1.
Double-check your email. A typo means we cannot reach you or resend your guide.
We will send occasional emails you can unsubscribe from at any time. See our Privacy Policy.