What is the Omega 3 Index Complete test?

The Omega 3 Index Complete test measures the percentage of omega-3 fatty acids—EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid)—within red blood cell membranes. This provides a reliable indicator of long-term omega-3 status rather than short-term dietary intake.

Because red blood cells reflect fatty acid levels over approximately three to four months, this test offers a more stable and clinically meaningful assessment than standard plasma omega-3 tests.

The complete profile may also include individual EPA and DHA values and omega-6 to omega-3 balance, helping assess inflammatory and cardiovascular risk more accurately.

Why do I need a test for Omega 3 Index?

Omega-3 deficiency is common in the UK, even among people who believe their diet is adequate. This test provides objective data to determine whether your omega-3 intake is sufficient to support heart, brain, and immune health.

It is particularly useful for individuals with cardiovascular risk factors, inflammatory conditions, mood or cognitive concerns, or those following low-fish or restrictive diets. It is also valuable for monitoring the effectiveness of omega-3 supplementation.

You may benefit from this test if you experience:

• Fatigue or low energy

• Joint pain or stiffness

• Brain fog or poor concentration

• Low mood or anxiety

• Dry skin or eyes

• High cholesterol or triglycerides

• Family history of heart disease

• Chronic inflammation or autoimmune conditions

Benefits of the Omega 3 Index Complete test

1. Measures long-term omega-3 status
   Reflects EPA and DHA levels over several months, providing a stable and accurate nutritional marker.

2. Supports cardiovascular risk assessment
   A low Omega-3 Index is associated with increased risk of heart disease.

3. Optimises omega-3 supplementation
   Helps determine whether current supplements and dosages are effective.

4. Assesses inflammatory balance
   Omega-3 fatty acids play a key role in regulating inflammation.

5. Supports brain and cognitive health
   DHA is essential for neurological structure and function.

6. Aids preventive health screening
   Identifies deficiencies before clinical symptoms develop.

7. Enables personalised nutrition planning
   Results can guide tailored dietary and lifestyle interventions.

8. Tracks response to lifestyle changes
   Useful for monitoring improvement after dietary or supplement adjustments.

Step-by-step – how we offer Omega 3 Index testing

Clinic-based testing (UK-wide)

• Choose your nearest UK clinic

• Attend your scheduled appointment

• A qualified clinician or phlebotomist collects your blood sample

• The sample is sent to the laboratory for analysis

• Results are issued once testing is complete

At-home or hotel testing (+£60)

• A qualified phlebotomist travels to your home or hotel

• Blood sample is collected in a comfortable, familiar environment

• No travel or clinic visit required

• Suitable for busy schedules or limited mobility

Both services are available UK-wide.

Your Omega 3 Index results explained

Low Omega-3 Index (below 4%)

Low levels indicate insufficient EPA and DHA in red blood cell membranes. This is commonly linked to increased cardiovascular risk, higher inflammation, and reduced support for brain and joint health.

Low omega-3 levels may result from limited oily fish intake, poor supplement absorption, or increased inflammatory demand.

UK reference range:

• Low: <4%

Normal Omega-3 Index (4–8%)

This range suggests moderate omega-3 status. While considered acceptable, individuals with cardiovascular risk factors or inflammatory conditions may benefit from increasing levels toward the upper end of the range.

Some people may still experience symptoms despite being within the normal range, depending on individual health needs.

UK reference range:

• Normal: 4–8%

High / Optimal Omega-3 Index (8% or above)

An Omega-3 Index of 8% or higher is associated with optimal cardiovascular protection and reduced inflammatory risk. This level is commonly observed in populations with regular oily fish consumption.

Maintaining optimal levels supports long-term heart, brain, and immune health when achieved through balanced nutrition or supplementation.

UK reference range:

• Optimal: ≥8%