Omega-3 Index & Vitamin D Blood Test

The Omega-3 Index & Vitamin D Blood Test measures two clinically important biomarkers linked to long-term cardiovascular, immune, and metabolic health using a simple at-home dried blood spot sample.

This test includes the Omega-3 Index (EPA + DHA in red blood cells) and 25-hydroxy Vitamin D [25(OH)D]. Together, these biomarkers provide a powerful overview of fatty acid balance, inflammation status, immune function, and cardiometabolic resilience.

The Omega-3 Index reflects long-term omega-3 status and is strongly associated with cardiovascular performance, metabolic balance, and healthy ageing. Vitamin D plays a central role in immune regulation, bone metabolism, hormone balance, and systemic health.

Suboptimal omega-3 and vitamin D levels are common — even in individuals who supplement. This combined test provides clinically relevant data analysed in certified laboratories to support personalised nutrition decisions and long-term health optimisation.

Ideal for individuals focused on cardiovascular health, immune strength, inflammation balance, and evidence-based supplementation.

Frequently Asked Questions

What does the Omega-3 Index & Vitamin D Blood Test measure?
This combined test measures the Omega-3 Index (EPA + DHA % in red blood cell membranes) and 25-hydroxyvitamin D [25(OH)D], the primary marker of vitamin D status. Together, these biomarkers provide a clear picture of fatty acid balance and immune/metabolic health.

Why combine these two biomarkers?
The Omega-3 Index and Vitamin D status are both strongly linked to cardiovascular health, immune regulation, inflammation balance, and long-term metabolic resilience. Testing them together gives a more complete view than either marker alone.

Who should consider this test?
It's ideal for anyone focused on cardiovascular health, immune strength, evidence-based supplementation, or healthy ageing. It's also relevant for individuals with low fish intake, limited sun exposure, or those already supplementing with omega-3 or vitamin D.

How is the sample collected?
The test uses a single dried blood spot (DBS) card. A few drops from a fingertip are all that's needed — no venous blood draw or clinic visit required.

Do I need to fast before the test?
No. The Omega-3 Index reflects long-term intake and is not affected by recent meals. Vitamin D testing also doesn't require fasting.

How accurate is the test?
The Omega-3 Index is analysed by gas chromatography and vitamin D by LC-MS/MS — both gold-standard methods used in clinical research and hospital labs.

How long does it take to get results?
Results are available 3–5 business days after your sample arrives at the lab.

Where is my sample analysed?
Samples from the Asia-Pacific region, including Australia and New Zealand, are analysed in our accredited laboratory in Australia. Samples from Europe and the United Kingdom are processed in our certified EU laboratory, ensuring all results meet international clinical standards for accuracy and reliability.