According to a 2025 global review published in Nutrition Research Reviews, 76 percent of people worldwide are not meeting recommended intakes of EPA and DHA. In the United States, that gap is just as wide, with most adults consuming far less seafood than dietary guidelines suggest. Understanding how omega-3 supplements with EPA and DHA work, what differentiates one product from another, and how much you actually need is the first step toward closing that gap. Our guide to omega-3 supplement uses provides additional context on how these nutrients fit into daily life.
This article walks through the science behind EPA, DHA, and DPA; explains the forms and dosing that matter most; and offers practical criteria for evaluating quality. Whether you are comparing softgels for the first time or refining a regimen you have followed for years, the information below is grounded in peer-reviewed research and transparent sourcing data.
What Are EPA, DHA, and DPA?
The majority of scientific research on omega-3 fatty acids focuses on three types: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). ALA contains 18 carbon atoms, whereas EPA and DHA are considered long-chain omega-3s because EPA contains 20 carbons and DHA contains 22. A third long-chain omega-3, docosapentaenoic acid (DPA), is less commonly discussed but is present in meaningful amounts in certain fish oils and may complement the roles of EPA and DHA.
ALA is found in plant foods such as flaxseed, chia seeds, and walnuts. However, the body converts ALA to EPA and DHA at very low rates. ALA is found in certain plant oils, such as flaxseed, soybean, and canola oils, and in some other plant foods, such as chia seeds and walnuts. Because that conversion is so limited, obtaining preformed EPA and DHA from marine sources or supplements remains the most reliable strategy.
To learn more about the broader family of these nutrients, visit our resource on omega-3 fatty acids.
How EPA and DHA Support Your Health
Decades of research have examined the roles of EPA and DHA in multiple body systems. Here is a concise overview of the structure/function benefits supported by the current body of evidence.*
Cardiovascular health. EPA helps maintain healthy triglyceride levels already within a normal range and supports overall cardiovascular function. A 2020 review of 86 studies involving 162,796 people found that increasing EPA and DHA was associated with modest cardiovascular benefits. DHA contributes to healthy cell membrane fluidity in cardiovascular tissue.
Cognitive function. DHA is the most abundant long-chain omega-3 in the brain. A large prospective analysis of the UK Biobank cohort (217,122 participants ages 40 to 64) found that higher circulating omega-3 blood levels were significantly associated with cognitive health benefits. EPA, meanwhile, supports a healthy inflammatory response that may promote brain wellness.
Eye health. DHA is concentrated in the retina, where it supports visual function and healthy retinal cells. Adequate intake throughout life helps maintain the structural integrity of photoreceptor membranes.
Joint comfort. EPA supports a healthy inflammatory response in joint tissue. Many adults who are physically active look to EPA-rich supplements to help maintain joint comfort and mobility.
Balanced mood. Emerging research explores the relationship between EPA intake and mood regulation. While results are still evolving, EPA is frequently studied for its role in supporting balanced mood.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Why Most People Do Not Get Enough Omega-3s
The scale of the omega-3 shortfall is striking. A collaborative review published in December 2025 highlights that 76 percent of people worldwide are not meeting recommended intakes of EPA and DHA, revealing a significant global public health gap. In the US specifically, the Federal Government's Dietary Guidelines for Americans 2020 to 2025 recommends that adults eat 8 ounces or more of a variety of seafood per week, yet most Americans fall well short of that target.
Several factors drive this deficit. Low oily fish intake, accessibility issues related to cost and taste preferences, and a dietary imbalance caused by high omega-6 consumption from processed foods all contribute. A 2025 Northwestern University study found that among over a thousand parents surveyed, several factors were associated with lower omega-3 intake from food, including lower household income and not taking supplements that contain DHA.
For anyone who finds it difficult to consume two or more servings of fatty fish every week, a high-quality supplement with concentrated EPA and DHA becomes a practical option to help bridge the gap. If you are wondering why you need omega-3s, the data above provides a compelling answer.
What to Look for in an Omega-3 Supplement
Not every fish oil capsule on the shelf delivers the same value. The following criteria separate a genuinely effective omega-3 supplement from one that merely looks the part.
EPA and DHA Concentration per Serving
Labels often highlight total oil rather than EPA and DHA content, leading to under-dosing. Always flip the bottle and read the Supplement Facts panel for the individual milligram amounts of EPA and DHA. A product listing 1,000 mg of "fish oil" may contain as little as 300 mg of combined EPA and DHA.
Molecular Form: Triglyceride vs. Ethyl Ester
Ethyl ester (EE) form is a processed form of fish oil that allows manufacturers to concentrate EPA and DHA more cheaply, but ethyl esters are less bioavailable than triglycerides, more prone to oxidation, and may not absorb as well without a fatty meal. If you want to explore this distinction in depth, our comparison page on omega-3 supplement forms breaks it down clearly.
Purity and Third-Party Testing
Mercury, dioxins, and PCBs can accumulate in fish tissue. Look for supplements that undergo molecular distillation and carry independent third-party certifications confirming heavy-metal levels well below safety thresholds. A certificate of analysis should be accessible to verify both purity and freshness (oxidation levels).
Sustainability Certifications
Responsible sourcing matters. Certifications such as Friend of the Sea or Marine Stewardship Council indicate that the fish used in the supplement were harvested using environmentally responsible practices.
How EPA and DHA Dosing Recommendations Compare
The most frequently recommended intake for adults is 250 mg per day of combined EPA and DHA, with an additional 100 to 200 mg of DHA advised for pregnant women, according to the 2025 global review from the University of Southampton and the University of East Anglia. However, many health organizations and practitioners suggest higher daily amounts for adults seeking broader support.
The table below summarizes general intake ranges referenced across major guidelines. For pregnant women, children, or anyone taking medication, please consult your healthcare provider for personalized guidance.
| Population | Commonly Cited EPA + DHA Range | Notes |
|---|---|---|
| Healthy adults (general maintenance) | 250 to 500 mg/day | Most common minimum from global authorities |
| Adults seeking broader support | 1,000 to 2,000 mg/day | Used in many clinical research protocols |
| Higher-dose protocols | 2,000 to 3,000 mg/day | Sometimes recommended by practitioners; talk to your healthcare provider |
Our Omega-3 2100 delivers 2,100 mg of long-chain omega-3s per serving (1,350 mg EPA, 600 mg DHA, and 150 mg DPA) in just two small softgels, placing it at the higher end of clinically studied dosing ranges.
Comparing Popular Omega-3 Supplement Features
When evaluating omega-3 supplements with EPA and DHA, it helps to see key differentiators side by side. The table below highlights criteria that matter most for potency, purity, and overall value.
| Feature | OceanBlue Omega-3 2100 | Typical Fish Oil Supplement |
|---|---|---|
| Combined EPA + DHA + DPA per serving | 2,100 mg (1,350 EPA / 600 DHA / 150 DPA) | 500 to 1,000 mg (EPA + DHA only; DPA rarely included) |
| DPA ("the third omega-3") | Yes (150 mg) | Rarely listed |
| Mercury level | ≤1 ppb (mercury-free) | Varies; not always disclosed |
| Molecular distillation | 27x distilled | Typically 1 to 3x |
| Sustainability certification | Friend of the Sea | Varies |
| Softgel size | Small, burpless | Often large; may cause aftertaste |
OceanBlue also offers specialized blends that pair omega-3 with vitamin D3, K2, CoQ10, turmeric, lutein, or NEM, allowing you to consolidate multiple daily supplements into fewer capsules.
The Role of DPA: The Third Long-Chain Omega-3
Most omega-3 conversations focus on EPA and DHA, but DPA (docosapentaenoic acid) deserves attention. DPA is a 22-carbon long-chain omega-3 found naturally in fish oil, though most manufacturers do not standardize for it. Emerging research suggests DPA may support the body's use of both EPA and DHA, and it is being studied for its own contributions to cardiovascular and cellular health.
By including 150 mg of DPA per serving alongside high-potency EPA and DHA, our formulas reflect a more complete long-chain omega-3 profile than products that omit DPA entirely. For a broader look at how these nutrients work together, explore our overview of omega-3 vitamins.
Practical Tips for Getting the Most From Your Supplement
Taking a high-quality omega-3 supplement is only part of the equation. How and when you take it can influence absorption and comfort.
- Take with a meal containing fat. Long-chain omega-3s are fat-soluble. Consuming your softgels alongside a meal that includes dietary fat supports better absorption.
- Store properly. Keep your bottle in a cool, dry place. Some people prefer refrigeration, which can also help minimize any aftertaste.
- Be consistent. Benefits associated with omega-3 supplementation are cumulative. Most research protocols run for a minimum of 8 to 12 weeks before evaluating outcomes.
- Check the Supplement Facts panel. Confirm that the per-serving EPA and DHA amounts meet your target. Do not rely on the "total fish oil" number alone.
- Talk to your healthcare provider before starting any new supplement, particularly if you are pregnant, nursing, taking medication, or managing a health condition.
Conclusion
The evidence is clear: most people, in the US and globally, are not consuming enough long-chain omega-3s from diet alone. With 76 percent of people worldwide falling short of recommended EPA and DHA intakes, supplementation remains one of the most practical steps you can take to support cardiovascular health, cognitive function, eye health, joint comfort, and balanced mood.* Choosing a product with verified potency, rigorous purity testing, and a complete omega-3 profile (including DPA) ensures you are investing in quality rather than guesswork.
OceanBlue Omega delivers pharmaceutical-grade, mercury-free omega-3 supplements rich in EPA and DHA, backed by 27x molecular distillation, Friend of the Sea certification, and the addition of DPA that most fish oils omit. To find the formula that fits your daily routine, explore our full omega-3 product line and take the next step toward closing the omega-3 gap.
*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure, or prevent any disease.
Frequently Asked Questions
How much EPA and DHA should you take per day?
Most global authorities recommend a minimum of 250 to 500 mg of combined EPA and DHA daily for general adult maintenance. Many practitioners suggest higher amounts for targeted support. Our Omega-3 2100 provides 1,950 mg of EPA and DHA (plus 150 mg of DPA) in just two softgels. Always consult your healthcare provider for personalized dosing.
Is there a difference between fish oil and omega-3?
Fish oil is a source of omega-3 fatty acids, but the two terms are not interchangeable. The value of a fish oil supplement depends on how much EPA and DHA it actually delivers per serving, not the total oil volume. Look for products that clearly list EPA, DHA, and (ideally) DPA on the Supplement Facts panel.
Can you get enough omega-3 from food alone?
It is possible if you consistently eat two or more servings of fatty fish per week. However, research shows that most Americans do not reach that level. A high-quality supplement with concentrated EPA and DHA can help bridge the gap when dietary intake falls short.
Article by the OceanBlue Omega editorial team.
