DHA (docosahexaenoic acid) is a long-chain omega-3 fatty acid measured as part of a blood fatty-acid profile to assess omega-3 status. DHA reflects the proportion of DHA in circulation and indicates longer-term intake of marine omega-3s. Low DHA levels may be associated with higher inflammation, dyslipidaemia, insulin resistance, and increased cardiovascular risk, and can also align with reduced cognitive performance, low mood, or poor recovery, while higher levels generally reflect greater dietary exposure. This matters because DHA supports brain function, vision, and heart health, with impacts on focus, energy regulation, and metabolic health. A DHA blood test is best interpreted alongside EPA, Total Omega 3 Fatty acids, omega-6, and the omega-6 to omega-3 ratio to clarify the overall pattern.
Vively's health team can help you test DHA. You start with the Baseline Health Check, then add this test.
Every marker in range? Get your $99 back. T&Cs apply.Want to save 25%? Try our 4-Month Reset insteadDHA (docosahexaenoic acid) is a long-chain omega-3 fatty acid measured as a percentage of total fatty acids in the blood. It forms part of every cell membrane and plays a key role in supporting brain function, learning, attention, and overall energy balance. Because DHA reflects longer-term dietary intake, it’s a useful indicator of how well your nutrition is supporting cognitive and metabolic wellbeing.
DHA contributes to memory, focus, mood balance, learning capacity, and the integrity of nerve and eye tissue. It also helps maintain flexible, resilient cell membranes that support communication between cells. Tracking DHA gives you insight into how your lifestyle supports long-term vitality, performance, and healthy ageing.
The laboratory reference range for DHA is 1 to 6.5%, which shows the expected population spread. For proactive health, an optimal level is typically above 2.5%, suggesting strong and consistent omega-3 availability. Staying in this range supports sharper thinking, steadier energy, and better overall metabolic balance.
Your diet has the largest impact, particularly how often you eat oily fish such as salmon, sardines, or mackerel. Broader lifestyle factors also play a role, including overall nutrient intake, long-term eating patterns, and individual variation in how efficiently your body converts plant-based omega-3s into DHA.
Levels below the optimal range may indicate that your diet isn’t providing enough steady omega-3 support for cognitive and cellular performance. Higher levels generally reflect increased intake of marine-based omega-3s. Tracking changes over time helps you understand how your habits influence long-term omega-3 status.
Regularly including oily fish in your meals is the most effective way to support DHA. You can also incorporate other omega-3-rich foods, pay attention to the balance of fats in your diet, and follow consistent eating patterns that promote long-term nutrient stability.
How to get it: Available as one of our specialty add-on tests. Your test referral is issued straight away when you order. See how a blood test without a referral works.
Related tests: EPA, Omega-3 Index, Total Saturated Fats, Total Omega 9
The Baseline Health Check reads 70+ markers, then your dietitian turns your results into a plan. $99 a month, first test included.
Every marker in range? Get your $99 back. T&Cs apply.