Omega-3 Index
Here’s what it reflects — and what to do about it.
Longetic pulls together every lab and record you’ve had, follows how Omega-3 Index changes over time, and explains what’s shifting — so you walk into your next appointment prepared, with reminders for retests along the way.
What is Omega-3 Index?
A measure of how much omega-3 fat (EPA plus DHA) is present in your cells, expressed as a percentage of total fatty acids.
The omega-3 index reflects the combined amount of two marine omega-3 fats, EPA and DHA, and is reported as a percentage of your total fatty acids. It is often used as a longer-term picture of your omega-3 status from diet and supplements. The FDA notes that supportive but not conclusive research shows EPA and DHA may reduce the risk of coronary heart disease, so a higher index is studied in that context; a lower index can simply reflect low intake of oily fish or omega-3 supplements. It is an extended nutrition marker rather than a routine screen.
What to know about Omega-3 Index
Understanding Omega-3 Index means knowing what it reflects, what tends to move it, and the signs that suggest it’s worth a closer look — so you can bring the right questions to your next appointment.
This glossary entry is for informational purposes only and is not a substitute for professional medical advice. Read our Medical Disclaimer.
References
About our sources
Official sources
Government health agencies, national institutes, and intergovernmental bodies whose guidelines carry regulatory or policy weight.
Clinical / professional
Medical societies, specialty colleges, and professional associations whose consensus statements reflect clinical practice standards.
Peer-reviewed research
Original research articles and systematic reviews published in indexed journals and verified through PubMed or DOI.