To ensure a proper and sufficient supply of essential omega-3 fatty acids, individuals should consume fresh fatty marine fish from cold Arctic waters at least twice a week. Since this realistically occurs only in a few regions around the globe, the diet of most people worldwide remains deficient in omega-3 intake.

Consequently, accessing high-potency omega-3 dietary supplements to compensate for this deficit becomes highly essential.

The current market offers a highly diverse and abundantly packed selection. For example, on our local market, there are likely over 60 such products available. While it is beneficial to have options—as each can serve a purpose—a vital question arises:

How to Choose the Right Omega-3 Supplement

A purchasing decision is ultimately a subjective and independent choice that must be respected. However, it is crucial that this choice is as highly informed as possible. An informed individual is not only more empowered but also healthier.

Here are 4 foundational pieces of information that consumers should keep in mind when choosing an omega-3 product to ensure they get the absolute best value for their money:

1. What does Omega-3 mean and why are these products important?

“Omega-3” defines several vital substances within the essential fatty acids category. The term “essential” refers to nutrients that are absolutely necessary for the proper function and growth of our body, which the body cannot produce on its own and must receive from external sources through food and/or dietary supplements.

The most important omega-3 fatty acids are docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA). Both independently and together, they integrate into various biological structures and directly influence a series of biochemical processes within the body.

• DHA is found abundantly in the brain and the retina, playing a crucial role in the formation, development, and optimal functioning of the brain and eyes.
• An adequate intake of DHA supports a healthy pregnancy, particularly the development of the fetal brain.
• For the growing body, DHA is vital for brain and eye development and function in young children and adolescents.
• Crucial Note: These health benefits can ONLY be achieved with a minimum daily intake of at least 250 mg of DHA.
• DHA and EPA combined support cardiovascular health and can help reduce “bad cholesterol” (low-density lipoprotein or LDL) while raising “good cholesterol” (high-density lipoprotein or HDL) levels.
• An adequate intake of DHA and EPA reduces the risk of preterm births.
• Crucial Note: To effectively support heart health, the required minimum daily intake of EPA and DHA combined must be at least 250 mg.
• EPA actively participates in anti-inflammatory processes within the joints.
• Crucial Note: To achieve concrete anti-inflammatory effects, the minimum required daily intake of EPA is 1 to 4 grams.

(According to EU Regulation No. 1169/2011)

The Takeaway: Always carefully analyze the actual omega-3 content per capsule before buying a product. In some low-concentration cases, you might need to take up to 8 capsules a day to meet the minimum daily requirement—making the product highly expensive in the long run, even if it looks cheap on the shelf at only 10–20 RON.

2. What form are DHA and EPA in: EE or TG?

Technically, yet very simply put, the production of omega-3-rich fish oil follows these steps: the fish is minced and pressed, resulting in a crude (raw) oil that typically contains around 15%–20% omega-3 in its natural triglyceride (TG) form—which are natural combinations (esters) of glycerin with omega-3 fatty acids.

To concentrate the oil, the fatty acids are extracted from this crude oil using highly concentrated ethyl alcohol. This process, known as transesterification, breaks down the triglycerides to create ethyl esters (EE) of omega-3 fatty acids. Ethyl esters are an artificial, industrially obtained form of omega-3.

The oil is then sent for refining (distillation) to be thoroughly purified and separated from environmental pollutants such as heavy metals (like lead or mercury).

The final result of this stage is a purified fish oil with an omega-3 content of roughly 30%–35%, present as ethyl esters (EE). The vast majority of manufacturers stop at this exact stage, which is why a massive number of products on the market contain 30%–35% omega-3 as ethyl esters (EE). It is vital to check which type of omega-3 a product contains, because EE and TG are definitely not the same thing.

The highest-performing fish oil manufacturers introduce an additional step into the production cycle. They re-convert the EE back into the natural triglyceride (TG) form through a process called enzymatic re-esterification. This requires highly sophisticated technology which, naturally, increases production costs. Re-esterifying EE oil back into TG increases manufacturing costs by 30%–40%, which is why most producers choose to stop at ethyl esters as their finished material.

Why Form Matters:

• In all living organisms (both plants and animals), fats naturally exist as triglycerides (TG). Only these substances enter human metabolism seamlessly to support bodily functions and growth; it is the only form the human body naturally recognizes and processes effectively.
• When a fish oil containing omega-3 as triglycerides (TG) reaches the digestive tract, it is instantly recognized by the mucosal cells of the small intestine and rapidly absorbed into the lymphatic system. From there, it passes directly into the bloodstream, being immediately transported throughout the entire body to be utilized wherever needed.
• Conversely, when omega-3 compounds are introduced as ethyl esters (EE), they suffer from a poor absorption rate of only 20% to 40%. Furthermore, what does get absorbed as EE must first be routed to the liver, where the ethyl alcohol is cleaved and removed, and the remaining fatty acids are reconstructed into triglycerides before finally being introduced into the bloodstream. This results in a significantly longer absorption time and substantial quantitative loss—first during intestinal absorption, and then in the liver, where oxidative degradation occurs during the alcohol separation process.

Summary Comparison:

• Omega-3 as TG represents the natural form; it is absorbed rapidly and completely.
• Omega-3 as EE is only partially absorbed and must pass through the liver first to be converted into TG. The absorption time is much longer, and the net amount utilized is significantly smaller due to major internal losses.

Important Detail: Omega-3 ethyl esters (EE) are highly unstable molecules that oxidize very easily, losing their nutritional value. To stabilize them, capsule manufacturers must add large amounts of Vitamin E to the oil.

If you analyze a product and notice that a 1000 mg capsule contains 10–12 mg of Vitamin E, it is a clear sign that the product uses the artificial ethyl ester (EE) form.

In contrast, products featuring natural triglyceride (TG) omega-3 require only 2–3 mg of Vitamin E per capsule, because triglycerides are naturally far more stable. A references list of online scientific studies supporting these facts is provided at the end.

3. The Source of the Fish Oil

It is widely established that the best and most consistent source of omega-3-rich oil is wild oceanic fish thriving in cold Arctic waters, which naturally makes them very fatty. Excellent examples include anchovies, herring, sardines, mackerel, cod, tuna, and salmon.

• Crucial Note: Atlantic Salmon (Salmo salar) is a protected species, meaning industrial wild-catch fishing for salmon is strictly limited within the EU. Therefore, products labeled as “salmon oil” are most likely sourced from artificially fed, farmed fish.

4. The Fish Oil Manufacturer

This is the factor of ultimate importance. The technology utilized, the manufacturer’s experience, and their global reputation are absolutely definitive for product quality. Just as Mercedes or Volvo are globally respected automotive brands—synonymous with quality, safety, and comfort—the same standard applies to the production of omega-3-rich fish oils.

There are premier manufacturers with over 180 years of expertise (such as the Norwegian fish oil producer Epax AS) utilizing state-of-the-art technology. They are recognized and respected worldwide, certified by prestigious international industry organizations like GOED (Global Organization for EPA and DHA Omega-3). GOED enforces extremely stringent quality and purity standards for omega-3 enriched fish oils. The most reputable and leading manufacturers are listed directly on their official website (goedomega3.com). Producers who cannot meet the rigorous quality levels demanded by GOED simply cannot become members. Visiting this site is an excellent way to ensure you stay fully informed.

Discover more about the wide-ranging health benefits of premium fish oil.

Bibliography:

1. Dyerberg J, Madsen P, Møller JM, Aardestrup I, Schmidt EB (2010). Bioavailability of marine n-3 fatty acid formulations.
2. Lawson LD, Hughes BG. Human absorption of fish oil fatty acids as triacylglycerols, free acids, or ethyl esters. Biochem Biophys Res Commun 1988;152:328–335.
3. Beckermann B, Beneke M, Seitz I. Comparative bioavailability of eicosapentaenoic acid and docosahexaenoic acid from triglycerides, free fatty acids and ethyl esters in volunteers. Arzneimittelforschung 1990;40:700–704. [German]