Omega-3 and -6 Blood Test Kit

The Omega-3 Index measures the percentage of EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid) as a proportion of total fatty acids in your red blood cell membranes. These long-chain omega-3 fatty acids are the biologically active forms that provide the cardiovascular, neurological, and anti-inflammatory benefits associated with omega-3 consumption. The Omega-3 Index reflects your average omega-3 intake over the past 2-3 months—the lifespan of red blood cells—making it a stable and reliable marker that isn't affected by your most recent meal. EPA and DHA are found primarily in oily fish (salmon, mackerel, sardines, anchovies, herring), and to a lesser extent in seafood, grass-fed meat, and omega-3 enriched eggs. The body can convert the plant-based omega-3 ALA (alpha-linolenic acid, found in flaxseed, chia seeds, and walnuts) into EPA and DHA, but this conversion is inefficient—typically only 5-10% of ALA is converted to EPA and even less to DHA. This is why vegetarians and vegans often have lower Omega-3 Index levels unless they supplement with algae-derived omega-3s (algae oil contains both EPA and DHA and is the original source from which fish obtain their omega-3s). The Omega-3 Index has been extensively researched as a marker of cardiovascular risk. Studies suggest that an Omega-3 Index above 8% is associated with significantly reduced risk of sudden cardiac death and coronary heart disease compared to levels below 4%. It has been proposed as a cardiovascular risk factor alongside cholesterol, blood pressure, and smoking. Beyond heart health, adequate EPA and DHA support brain function, mood, eye health, joint health, and healthy inflammatory responses throughout the body. Optimal Omega-3 Index is 8% or higher—this is the target zone associated with lowest cardiovascular risk. Levels of 4-8% indicate moderate risk and suggest room for improvement. Levels below 4% are considered high risk and indicate significant omega-3 deficiency. Unfortunately, the average Omega-3 Index in Western populations is around 4-5%—well below optimal. Increasing oily fish consumption to 2-3 portions per week, or taking a quality omega-3 supplement providing at least 500-1000mg combined EPA/DHA daily, can improve your Omega-3 Index over 2-3 months. Results outside the optimal range may benefit from dietary adjustments.

The ARA: EPA ratio compares levels of arachidonic acid (ARA), an omega-6 fatty acid, to EPA, an omega-3 fatty acid. This ratio provides insight into the balance between pro-inflammatory and anti-inflammatory fatty acids in your body. Both omega-6 and omega-3 fatty acids are essential—the body cannot make them and must obtain them from diet—but the ratio between them matters significantly for health and inflammation. Arachidonic acid (ARA) is an omega-6 fatty acid found in meat, eggs, and dairy products. It's also produced in the body from linoleic acid, the omega-6 found abundantly in vegetable oils (corn, soybean, sunflower, safflower). ARA is a precursor to pro-inflammatory eicosanoids (signalling molecules including prostaglandins and leukotrienes) that play important roles in immune response and tissue repair but, when chronically elevated, contribute to inflammation-related diseases. EPA, by contrast, is a precursor to anti-inflammatory eicosanoids (resolvins) that help resolve inflammation and return tissues to homeostasis. In ancestral diets, the omega-6 to omega-3 ratio was approximately 1:1 to 4:1. Modern Western diets, with their high intake of vegetable oils and low intake of oily fish, often have ratios of 15:1 to 20:1 or higher. This dramatic shift toward omega-6 dominance is thought to contribute to the chronic low-grade inflammation associated with cardiovascular disease, metabolic syndrome, autoimmune conditions, and other inflammatory diseases. Rebalancing this ratio by increasing omega-3 intake and moderating omega-6 intake may help reduce inflammatory burden. An optimal ARA: EPA ratio is generally considered to be below 3:1, with some researchers suggesting below 1.5:1 as ideal. Ratios of 3:1 to 10:1 indicate room for improvement, while ratios above 10:1 suggest significant omega-3 deficiency relative to omega-6. To improve your ratio, increase EPA intake (oily fish, fish oil supplements, algae oil) and consider reducing omega-6-rich vegetable oils in favour of olive oil or other cooking methods. The ratio typically improves within 2-3 months of dietary change or supplementation. Results should be interpreted alongside the Omega-3 Index for a complete picture of your essential fatty acid status.