As evidence demonstrating the health benefits of omega-3 fats continues to grow, so does the desire to assess omega-3 status in healthcare facilities and at home. When choosing the proper Omega-3 status test, various options are available, each with benefits and limitations.
Whether you want to monitor your Omega-3 levels for health reasons or optimize your dietary intake, understanding the different types of tests can help you make an informed decision.
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This article will explore a recent review that dives deep into omega-3 status assessments, so that you can be more informed when choosing the right test for you.
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Why is it Important to Measure Your Omega-3 Level?Â
Omega-3 fats have been linked to reduced risk of disease and healthy aging throughout life. But how do you know if you’re getting enough in your diet? Historically, measuring and surveying dietary intake has been used to estimate the adequacy of omega-3s in the diet. However, this approach has several limitations that reduce precision and accuracy.
First, there are individual variations in omega-3 digestion, absorption, and utilization. Research reveals unmodifiable (sex, genetics, age) and modifiable (body size, physical activity, smoking, alcohol) factors, as well as differences in omega-3 bioavailability based on the form consumed and the dietary context in which they are consumed. Therefore, when biospecimens are tested, two people consuming the same amount of DHA + EPA in the diet could have very different omega-3 levels in their tissues.
Second, there are variations in individual needs. In addition to the factors already noted, researchers have pointed to different disease states and a person’s levels of inflammation as another factor. Some research suggests that individuals with different health conditions may use, and therefore require, higher omega-3 fats to support their needs. As an example, researchers suggest that since chronic stress and depression increase levels of pro-inflammatory mediators, individuals dealing with psychosocial stressors may have an increased use and need for omega-3s to counter that chronic inflammation. Potential differences in individual needs based on physiological demands highlight the need for omega-3 status testing.
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Third, there are documented differences in the omega-3 levels found in food sources. Evidence indicates that while general seafood intake guidelines can be helpful, the omega-3 content of fish varies wildly. The omega-3 content of salmon, for example, will vary based on how it’s raised (farmed vs. wild), the location and environmental conditions, and the fish’s diet. There are also considerable differences among omega-3 supplements. Variations can be found in formulations (triglycerides vs. ethyl esters vs. phospholipids vs. etc.), dose, and purity standards. Therefore, even if a person consumes the recommended amounts of food or supplements, omega-3 levels in the blood and tissues may still vary widely.
Finally, there is a lack of standardized recommendations for omega-3 fat intake in the United States and Canada. While several national and international organizations have set recommendations for fish, seafood, and EPA + DHA intake, they vary, which makes it hard for people to identify which recommendation they should adopt. With so many variables to consider, the most accurate way to assess adequate omega-3 intake and omega-3 status is through analytical tests of biological samples.
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New Review Describes Commercially Available Omega-3 Tests
A new review published in May 2024 evaluated all commercially available omega-3 tests on the North American market and provided information about the different ways to assess omega-3 status. The authors note that testing omega-3 status can lead to increased awareness and increased intake of omega-3-rich foods in those found to have low levels, potentially impacting health and longevity.
While readers can refer to the review for a more in-depth explanation of each test, it’s important to note some differences between omega-3 tests on the market. Some significant differences to consider include:
Fatty acids: Are you interested in individually assessing your EPA or DHA levels? Omega-3 index (O3i)? Omega-6 to omega-3 ratio? Arachidonic acid (AA) to EPA ratio? Trans-fat index? Complete fatty acid profile? Unsaturated fatty acid to the saturated fatty acid ratio? Various fatty acid types can be measured, so use a test specific to your goals and needs.
Type of Biological Sample: Different tests may require different sampling methods and tissues. Some may need a small, dried blood spot that requires a finger prick, while others may require whole blood or plasma drawn in a lab or clinical setting.
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Methodology: The methods by which omega-3 samples are assessed can vary, and some methods are proprietary and, therefore, protected.
Availability: Some tests can be ordered for individual or group use, while others require a healthcare provider or can only be ordered for research purposes.
The authors point out that the differences in omega-3 tests may be a reason why research outcomes assessing the health effects of omega-3 status have led to mixed outcomes. Understanding differences in testing methodology and the specific measurements evaluated by each test could help the scientific and medical communities, as well as  individuals find the proper test and interpret results more clearly.
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A Closer Look at the Omega-3 Index
Although the review was not necessarily to find the “best” omega-3 test, the authors did point out that various laboratories and researchers overall support the use of the Omega-3 Index test. The Omega-3 Index was first described in 2004 as a measurement of the amount of EPA and DHA in red blood cell (RBC) membranes expressed as a percentage of total RBC fatty acids.
Furthermore, the Omega-3 Index is long-term, stable indicator of dietary intake of seafood or fish oil supplements. While plasma phospholipid levels reflect shorter-term dietary intake, RBC levels are more reflective of long-term intake and tissue levels.
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In their May 2024 review, the study authors noted that the Omega-3 Index has been used in hundreds of medical and scientific studies and has the most extensive evidence base of all omega-3 status tests on the North American market.
According to the available evidence, an Omega-3 Index >8% is associated with a lower risk for poor health outcomes, and <4% is associated with a higher risk. However, this number increases for pregnant females where the recommended Omega-3 Index is as high as 11%. OmegaQuant’s Omega-3 Index test was one of the first omega-3 tests available to the public, academic, and health professional communities and is also available outside of the United States.
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What Tests can I get from OmegaQuant?
OmegaQuant Analytics offers a variety of tests that assess omega-3 status using dried blood or breast milk spots. Tests are simple and don’t require a prescription or a trip to the doctor’s office.
- Omega-3 Index Basic Test: Measures the amount of EPA and DHA in the blood.
- Omega-3 Index Plus Test: This test measures fatty acid levels in the blood and reports omega-3, omega-6, arachidonic acid, and trans-fat blood levels.
- Omega-3 Index Complete Test: This test measures all the fatty acids in the blood and reports levels of all 24 fatty acids, including the Omega-3 Index, ratios, and trans-fat index.
- Prenatal DHA Test: DHA is vital for fetal growth and development. Therefore, this test is specific and measures the amount of DHA in the blood.
- Mother’s Milk DHA Test: DHA is essential for infant growth and development. Therefore, this test is specific and measures the amount of DHA available in breast milk.
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 Summary
Evidence suggests that low omega-3 status is associated with adverse health outcomes. Yet, due to modifiable and unmodifiable variables between individuals, estimating omega-3 levels through omega-3 dietary intake has limitations. The best way to determine if you are meeting your omega-3 needs is through testing.
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With increased access and improved sampling methodology, omega-3 testing has never been easier. While there are several omega-3 tests available, one must pay attention to the differences in accessibility, cost, usefulness, and applicability before choosing. Health screening can increase early detection and empower individuals to be active participants in improving their health outcomes.
Omega-3 Index vs. Other Omega-3 Tests
