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Doctor's Assessment Included

Every result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

Cardiovascular

eGFR Value: What Does the CKD-EPI Value Mean in Blood Tests?

The eGFR value (estimated glomerular filtration rate) shows how well your kidneys filter the blood. The calculation uses the CKD-EPI formula, based on your creatinine, age, and sex. After age 40, kidney function may gradually change. Monitoring your eGFR CKD-EPI value can help notice changes. Your doctor can assess the GFR value in the context of your overall health. The information on this page is intended as general information and is not a substitute for professional medical advice. Always discuss your results with a doctor.

What It Measures

This test measures EPA and DHA as a percentage of total fatty acids in red blood cell membranes, reflecting omega-3 intake over the previous 2-3 months.

Why It Matters

An Omega-3 Index above 8% is generally associated with lower cardiovascular risk. Values below 4% may indicate increased risk. It is a modifiable marker that responds well to dietary changes. Consult your healthcare provider.

When to Test

Testing may be recommended as part of cardiovascular risk assessment, to evaluate omega-3 supplementation effectiveness, or to guide nutritional optimisation.

Symptoms

Low Levels

A low Omega-3 Index does not cause direct symptoms but may be associated with increased cardiovascular risk and a more pro-inflammatory state.

High Levels

A high Omega-3 Index is generally favourable and associated with cardiovascular protection. Very high levels are rare and not typically a concern.

Lifestyle Tips

Eat fatty fish at least twice per week (salmon, mackerel, sardines). Consider a quality omega-3 supplement if dietary intake is insufficient. Results typically improve within 2-3 months of consistent intake changes.

Frequently Asked Questions

What is a good Omega-3 Index?
An Omega-3 Index of 8% or higher is generally considered optimal for cardiovascular protection. Below 4% is considered high risk. Your healthcare provider can interpret your specific result.
How quickly can I improve my Omega-3 Index?
With consistent dietary changes or supplementation, improvements may be seen within 2-3 months, as the test reflects red blood cell turnover.
Is the Omega-3 Index better than measuring blood omega-3?
The Omega-3 Index reflects long-term omega-3 status (similar to HbA1c for glucose), making it more stable and clinically useful than a single blood measurement.