EPA + DPA + DHA (Omega-3) Biomarker Testing
It measures your omega-3 fatty acids (EPA, DPA, DHA) to gauge longer-term intake and balance, with easy ordering and Quest draw access via Vitals Vault.
With Vitals Vault, you have access to a comprehensive range of biomarker tests.
EPA, DPA, and DHA are omega-3 fatty acids that end up in your blood after you eat fatty fish or take omega-3 supplements. Testing them gives you an objective snapshot of your omega-3 status instead of relying on diet recall.
This test is most useful when you want to know whether your current intake is actually showing up in your body, or when you are trying to make a targeted change and want a clear way to track it over time.
Your result is not a diagnosis by itself. It is a piece of data you can review with your clinician alongside your lipids, inflammation markers, and overall cardiometabolic risk picture.
Do I need a EPA + DPA + DHA test?
You might consider EPA + DPA + DHA testing if you rarely eat fatty fish, you follow a diet that limits seafood, or you are unsure whether an omega-3 supplement is doing anything measurable. Many people feel fine even with low omega-3 status, so symptoms alone are not a reliable guide.
This test can also be helpful if you are working on heart and metabolic health and want another lens on dietary fat quality. Omega-3 status is often interpreted alongside triglycerides, LDL particle measures, blood pressure, and glucose markers.
If you have a bleeding disorder, you take anticoagulants or antiplatelet medications, or you are preparing for surgery, you should discuss omega-3 testing and supplementation plans with your clinician. The lab result can support clinician-directed care, but it should not be used for self-diagnosis or to make medication changes on your own.
This is a laboratory measurement performed in a CLIA-certified setting; results should be interpreted in clinical context and are not a standalone diagnosis.
Lab testing
Order EPA + DPA + DHA testing through Vitals Vault
Schedule online, results typically within about a week
Clear reporting and optional clinician context
HSA/FSA eligible where applicable
Get this test with Vitals Vault
Vitals Vault lets you order EPA + DPA + DHA testing directly, so you can check your omega-3 status without waiting for a referral. After you order, you complete your blood draw at a participating Quest location.
Once results are in, you can use PocketMD to put the numbers into context, including what “low,” “in range,” or “high” typically means and which companion labs can make the interpretation more actionable.
If you are making a change—such as increasing fatty fish intake, adjusting a supplement dose, or changing overall dietary fat pattern—Vitals Vault makes it easy to recheck and trend your results over time.
- Order online and draw at Quest locations
- PocketMD helps you prepare questions for your clinician
- Designed for retesting and trend tracking
Key benefits of EPA + DPA + DHA testing
- Shows whether omega-3 intake is translating into measurable blood levels.
- Helps you personalize dietary choices like fatty fish frequency and portion size.
- Supports smarter supplement decisions by giving you a baseline and a follow-up target.
- Adds context to cardiometabolic labs such as triglycerides and other lipid markers.
- Can flag an imbalance between omega-3 and omega-6 patterns when paired with a broader fatty acid profile.
- Helps you monitor changes over time after diet, weight, or medication shifts that affect lipids.
- Gives you a clear data point to review in PocketMD and bring to your clinician for shared decision-making.
What is EPA + DPA + DHA?
EPA (eicosapentaenoic acid), DPA (docosapentaenoic acid), and DHA (docosahexaenoic acid) are long-chain omega-3 fatty acids. You mainly get them from fatty fish (like salmon, sardines, and mackerel) and from fish oil or algae-based supplements.
In the body, EPA and DHA are incorporated into cell membranes and are involved in signaling pathways that influence inflammation and vascular function. DHA is especially abundant in the brain and retina, while EPA is often discussed in relation to inflammatory signaling and triglyceride metabolism. DPA sits between EPA and DHA in metabolism and can reflect longer-term omega-3 availability.
Depending on the lab, these markers may be reported as individual values (often as a percentage of total fatty acids) and sometimes as a combined total. Some reports also include an “omega-3 index” concept (commonly EPA + DHA in red blood cells), but your specific test name and specimen type determine what is calculated and how it should be compared.
Blood level vs. diet
Food frequency questionnaires can miss details like portion size, preparation method, and consistency over weeks. A blood-based measure can better reflect what your body is actually incorporating, especially if you are trying to verify that a supplement is absorbed and used.
Why three fatty acids are measured
EPA and DHA are the best-studied long-chain omega-3s, but DPA can add nuance because it may rise or fall differently depending on conversion and overall fatty acid balance. Looking at all three can help you avoid over-focusing on a single number.
What do my EPA + DPA + DHA results mean?
Low EPA + DPA + DHA
A low result usually means your long-chain omega-3 status is lower than what is commonly seen in people who eat fatty fish regularly or who consistently supplement. This can happen even if you occasionally eat seafood, because levels reflect patterns over time rather than one meal. Low omega-3 status is often reviewed alongside higher triglycerides, higher inflammatory markers, or an overall diet pattern low in marine fats, but the lab value alone does not diagnose cardiovascular disease.
Optimal (in-range) EPA + DPA + DHA
An in-range result suggests your current intake and absorption are sufficient to maintain typical blood levels for the method your lab uses. If you are taking a supplement, this can confirm that your current approach is achieving a measurable effect. Your clinician may still interpret the result differently depending on your goals, such as triglyceride lowering, pregnancy planning, or managing overall cardiometabolic risk.
High EPA + DPA + DHA
A high result most often reflects frequent fatty fish intake and/or higher-dose supplementation. Higher is not automatically better, because the “best” level depends on your health context and the specific assay. If your value is high and you also bruise easily, have nosebleeds, or take blood-thinning medications, it is worth discussing with your clinician before making further changes.
Factors that influence EPA, DPA, and DHA
Your results are influenced by how often you consume fatty fish, the dose and form of supplements, and how consistently you take them. Body weight changes, triglyceride levels, and overall dietary fat pattern can shift fatty acid distribution over time. Certain medications and health conditions that affect lipid metabolism can also change results. Finally, the specimen type (plasma vs. red blood cells) and reporting units (percent vs. concentration) affect how you should compare values and how quickly levels respond to changes.
What’s included
Frequently Asked Questions
Do I need to fast for an EPA + DPA + DHA blood test?
Fasting requirements vary by lab method and by whether your order includes other tests (like a lipid panel). If you are only measuring fatty acids, fasting is often not required, but you should follow the instructions on your requisition. If you are also checking triglycerides, fasting may be recommended for cleaner interpretation.
How long does it take for omega-3 levels to change after I start fish oil or eating more fish?
You can see movement within a few weeks, but more stable changes often take 8–12 weeks, especially if the test reflects longer-term incorporation into blood components. Consistency matters more than a single high-dose day. Retesting after about 2–3 months is a common approach when you are adjusting intake.
What is the difference between EPA + DHA and EPA + DPA + DHA?
EPA + DHA focuses on the two most commonly discussed long-chain omega-3s. Adding DPA can provide extra context because DPA may reflect conversion and longer-term availability differently in some people. The best choice depends on what your lab offers and what you and your clinician are trying to track.
Is this the same as an Omega-3 Index test?
Not always. “Omega-3 Index” commonly refers to EPA + DHA measured in red blood cells and reported as a percentage, but some tests measure fatty acids in plasma or report different calculations. Check your report for specimen type and the exact calculation used before comparing your number to Omega-3 Index targets you may see online.
Can I have low omega-3 levels even if I eat healthy?
Yes. A generally healthy diet can still be low in marine omega-3s if you do not eat fatty fish regularly or if you avoid seafood. Absorption, consistency, and overall fat intake pattern also influence blood levels, so testing can clarify whether your current routine is enough for your body.
What other labs pair well with EPA + DPA + DHA?
Common companions include a lipid panel (especially triglycerides), apolipoprotein B (ApoB) or LDL particle measures, and markers of metabolic health like fasting glucose or HbA1c. In some cases, a broader fatty acid profile or inflammation markers may add context. PocketMD can help you decide which follow-ups match your goals.