For healthy adults, the EFSA recommends a daily intake of 250 mg of EPA and DHA to support normal heart function. At the same time, the German Federal Institute for Risk Assessment (BfR) advises against consistently exceeding a total intake of 1.5 g of EPA and DHA per day from all sources (diet plus supplements), as higher amounts over longer periods are associated with, among other things, an increased bleeding tendency and a higher risk of atrial fibrillation. According to the German Nutrition Society (DGE), pregnant and breastfeeding women benefit from an additional 200 mg of DHA daily, as DHA has been shown to contribute to the normal brain and eye development of the fetus and breastfed infant.

What are EPA and DHA, and why can the body barely produce them on its own?

Omega-3 fatty acids are polyunsaturated fatty acids. Three of them are relevant to humans: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). ALA is primarily found in plant oils such as rapeseed or linseed oil and is considered essential, meaning the body cannot produce it itself. EPA and DHA are found mainly in fatty fish (salmon, mackerel, herring) and algae oil. While the body can convert ALA into EPA and DHA, the conversion rate is only about 5 to 10 percent for EPA and significantly lower for DHA. This is partly due to the enzyme delta-6-desaturase, which acts as a limiting factor in this conversion step and whose activity is influenced by factors such as age, gender, and the intake of omega-6 fatty acids, which compete for the same enzyme. Therefore, those who rarely eat fish generally do not reliably meet their EPA and DHA requirements through plant sources alone.

DHA is also a structural component of cell membranes, particularly in the brain and the retina of the eye, where DHA accounts for an exceptionally high proportion of the fatty acids present. EPA plays a central role in lipid metabolism and the regulation of inflammatory processes. Neither fatty acid is stored by the body like fat deposits; they must be consumed relatively regularly, which makes the Omega-3 Index (more on that later) a useful status marker.

How much Omega-3 is actually in fish and plant-based sources?

How much EPA and DHA you get from your diet depends heavily on the type of fish. Fatty cold-water fish provide significantly more than lean varieties, and purely plant-based sources provide virtually no EPA or DHA, only the precursor ALA.

The German diet also provides significantly more omega-6 than omega-3 fatty acids; frequently cited estimates suggest a ratio above 10:1, whereas nutritional science considers a much more balanced ratio to be more favorable. This is caused by the high consumption of sunflower, thistle, and corn germ oil, as well as processed foods rich in omega-6 linoleic acid. Omega-6 fatty acids are not inherently unhealthy, but a significant imbalance at the expense of omega-3 is considered nutritionally unfavorable by several professional societies, partly because EPA and arachidonic acid (an omega-6 fatty acid) compete for the same metabolic pathways. Targeted omega-3 intake, whether through fish or supplements, counteracts this imbalance, without the need to avoid omega-6.

How much Omega-3 per day is actually recommended by the DGE and EFSA?

The German Nutrition Society (DGE) sets a reference value of 0.5 percent of daily energy intake for the essential omega-3 fatty acid ALA. There is no official DGE reference amount for EPA and DHA for the general population, but there is a clear additional recommendation for pregnant and breastfeeding women of at least 200 mg of DHA per day. The EFSA, in turn, has established specific minimum amounts for several health-related effects of EPA and DHA, which can serve as a guide for meaningful supplementation.

For most people without an existing cardiovascular diagnosis, the 250 mg starting dose is the sensible baseline, not the higher, medically justified dosages. With omega-3, more is not automatically better—more on that in the section on BfR limits.

Which effects of Omega-3 are actually scientifically recognized?

Unlike many plant-based supplements, the EFSA has officially approved several so-called health claims for EPA and DHA. This means that these statements may actually be communicated using the exact wording provided that the minimum amount is met. We deliberately list them here in the original wording because many providers dilute or exaggerate them:

• "EPA and DHA contribute to the normal function of the heart" from 250 mg EPA+DHA daily
• "DHA contributes to the maintenance of normal brain function" from 250 mg DHA daily
• "DHA contributes to the maintenance of normal vision" from 250 mg DHA daily
• "EPA and DHA contribute to the maintenance of normal blood pressure" from 3 g daily
• "EPA and DHA contribute to the maintenance of normal blood triglyceride levels" from 2 g daily

What these claims explicitly do not say: there is no approved EFSA statement that omega-3 treats depression, cures joint pain, broadly "strengthens" the immune system, or helps with weight loss. There are plausible biochemical mechanisms for an anti-inflammatory effect (EPA is a precursor for inflammation-resolving messengers called resolvins), but there is no general, EFSA-recognized statement regarding joint pain. Reputable providers formulate this as a plausible mechanism, not as a proven cure, and this exact distinction is missing in many market comparisons and test portals we reviewed for this article.

What do large studies really show? An honest look at VITAL and REDUCE-IT

The EFSA claims regarding heart function, brain, and vision are based on solid mechanistic and nutritional data, but they are not the same as evidence that supplementation prevents heart attacks in healthy people without pre-existing conditions. It is worth taking an honest look at two of the largest randomized studies of recent years, as they show that the answer is more nuanced than many marketing claims suggest.

The VITAL study, one of the largest investigations on this topic with around 25,000 participants in the USA, tested a daily dose of 1 g of fish oil (combined EPA/DHA) in healthy adults with no known cardiovascular disease. For the primary endpoint—major cardiovascular events and cancer combined—there was no statistically significant protective effect compared to a placebo. However, in secondary analyses not predefined as a primary goal, a reduction in heart attacks of about 28 percent was observed, and this was significantly more pronounced in participants with low fish consumption and in the subgroup of African American study participants. Cardiologists like Steven Nissen, however, explicitly warned against caution in interpretation, as these were analyses of sub-analyses and no general therapy recommendation should be derived from them.

A different picture was presented by the REDUCE-IT study with over 8,000 participants, predominantly with existing cardiovascular disease or diabetes plus other risk factors, as well as elevated triglyceride levels despite statin therapy. Here, they did not test standard commercial fish oil, but high-dose, pure EPA (2 g twice daily as prescription-grade icosapent ethyl). The result: a reduction of major cardiovascular events by about 25 percent, heart attacks fell by about 31 percent, and strokes by about 28 percent. At the same time, the study also showed more hospitalizations due to atrial fibrillation and a slightly increased rate of major bleeding in the treatment group, a pattern consistent with the BfR warnings at high doses.

The honest summary: For healthy people without risk factors, the evidence for a hard cardiovascular benefit from low-dose supplementation is inconsistent, whereas high-dose, pure EPA showed a clear effect in a large study for already ill high-risk patients under medical supervision. Both are different from the claim "omega-3 protects against heart attacks," which is often found in simplified forms in advertising. The EFSA heart function statement for doses from 250 mg remains valid, but it refers to the maintenance of normal function, not the prevention of specific events in high-risk patients.

Omega-3 and interactions: What to watch out for with blood thinners

EPA and DHA inhibit the formation of thromboxane A2, a messenger involved in blood clotting. In low, standard daily doses, this effect is usually clinically insignificant. At an intake of about 1 g per day, however, the anticoagulant effect can become noticeable and may be amplified by the effect of vitamin K antagonists such as phenprocoumon (Marcumar) or acetylsalicylic acid (aspirin). For people taking such medications, the following applies:

• Consult a doctor before beginning omega-3 supplementation above the baseline supply
• If anticoagulation is already established, have your INR value checked regularly if supplementation is recommended by a doctor
• Coordinate the intake with your medical team before planned surgeries, as increased bleeding tendency can affect perioperative risk
• Do not increase the dose on your own just because "more omega-3 sounds healthier"

For most healthy people without coagulation medication, this point is largely negligible at the common supplement dosage of 250 mg to about 1 g, but it is one of the points frequently missing in product descriptions that are relevant for an informed decision.

Omega-3 in pregnancy and breastfeeding: What women should know

DHA is the only omega-3 fatty acid with its own specific EFSA supplementary recommendation tailored to pregnant women. The reason: DHA accumulates particularly strongly in the fetal brain and retina in the third trimester, and the maternal DHA level correlates directly with the child's supply. The specific EFSA recommendation is: in addition to the 250 mg for adults, pregnant and breastfeeding women should supplement at least 200 mg of DHA per day, for a total of about 450 mg of EPA+DHA, of which at least 200 mg must be DHA.

For women who eat little or no fish during pregnancy as a precaution (e.g., due to concerns about heavy metal contamination from predatory fish like tuna or swordfish), the BfR recommends opting for low-heavy-metal fish varieties (salmon, herring, mackerel in moderate amounts) or using a supplement. Any nutritional supplement should generally be discussed with the attending gynecologist during pregnancy, especially if additional iron or multivitamin supplements are being taken, in order to avoid an unintentional double dose of fat-soluble nutrients. Anyone interested in iron intake during pregnancy can find the current DGE reference values for pregnancy in detail in the Veyt guide on iron for women.

Important context: The additional DHA amount of 200 mg is a comparatively small, well-studied supplement. It should not be confused with the significantly higher, medically indicated doses of 2 to 3 g that apply to other groups of people and different target values.

At what point does omega-3 become risky? BfR limits and potential side effects

Omega-3 is generally considered well-tolerated, but it is not a nutrient where "more is better" applies. The BfR recommends that the total intake from food and supplements should not permanently exceed 1.5 g of EPA and DHA per day. This recommendation is significantly lower than the upper limit deemed safe by the EFSA, which is up to 5 g of EPA+DHA combined (or 1.8 g of EPA alone) for healthy adults—a pattern seen with several nutrients: the EFSA defines a general safety upper limit, while the BfR suggests more conservative, precautionary maximum levels for dietary supplements.

For daily doses of about 2 g or more over longer periods, the following effects were observed in studies, which the BfR addresses in its assessment:

• an increased tendency to bleed, which is relevant primarily in combination with blood thinners (e.g., Marcumar, ASA) or before surgery
• an increased risk of atrial fibrillation in individuals with existing cardiovascular diseases, especially at doses around 2 g over two years and more significantly at around 4 g daily
• increased LDL cholesterol levels in some individuals on very high doses
• a possible impairment of immune function in older people taking high doses long-term

According to the Consumer Association (Verbraucherzentrale), a warning label is required on products starting at a daily dose of 2 g of EPA+DHA. For healthy adults without relevant pre-existing conditions, an intake in the range of 250 mg to about 1 g daily is unremarkable. People with cardiovascular diseases, those taking anticoagulants, or those facing upcoming surgery should have any dosage above the general intake recommendation cleared by a doctor beforehand.

How to identify a high-quality omega-3 supplement?

Most comparison portals focus on the pure EPA/DHA content per capsule and ignore the issue of freshness. Fish oil oxidizes, and oxidized oil typically smells strongly "fishy" rather than neutral; furthermore, bioavailability decreases. The relevant quality metric for this is the so-called TOTOX value (Total Oxidation), which is composed of the peroxide value (primary oxidation) and the anisidine value (secondary oxidation products). In the fish oil industry, a TOTOX value below 26 is widely considered the reference threshold for health-safe freshness; high-quality supplements are often significantly below this.

• TOTOX value: the lower, the fresher and more bioavailable the oil
• Origin and traceability: details on fish species and fishing area, no generic "fish oil" label
• Independent lab testing: certificates for heavy metals (mercury, lead), PCBs, and dioxins
• Packaging and storage: light-protected capsules, cool storage after opening slows further oxidation
• Carrier form: triglyceride form is considered more bioavailable than the cheaper-to-produce ethyl ester form

Veyt™ Omega-3 capsules are produced in Germany and lab-tested according to the criteria mentioned, with documented certificates of purity and safety. Those who wish to compare for themselves should actively ask every provider about the TOTOX value and proof of origin; many manufacturers only disclose these values upon request or in technical data sheets, not on the packaging.

Another point rarely addressed in test portals is the sustainability of the fishing method. Labels such as MSC (Marine Stewardship Council) indicate a controlled, non-overfished source. Since fish oil is usually obtained from small schooling fish like anchovies or sardines, which play an important role in the marine food chain, it is worth checking the relevant information, especially because the global demand for fish oil has risen noticeably due to the growing market for dietary supplements and aquaculture. Those who prioritize this aspect can alternatively switch to algae oil, which is produced independently of fishing.

One final, practical note on capsule size: high-dose supplements with 1,000 mg of fish oil or more per capsule are correspondingly large, which makes swallowing difficult for some people. Anyone having difficulty with this can switch to supplements with smaller, more concentrated capsules (higher EPA/DHA proportion per gram of oil) to achieve the same target amount with fewer, smaller capsules.

For whom is targeted omega-3 intake particularly relevant?

Not every group has the same baseline. For clear, nutritional reasons, some groups benefit particularly often from consciously addressing this topic:

• People who rarely or never eat fish: Without fish or algae oil, practically only the inefficient ALA conversion remains as a source, which generally does not cover the requirement for EPA and DHA.
• Vegans and vegetarians: A sufficient EPA/DHA level is usually not achievable solely through plant-based ALA sources like linseed, rapeseed, or walnut oil; an algae oil supplement is the more direct option here.
• Pregnant and breastfeeding women: See the additional DHA recommendation of 200 mg daily in the previous section.
• People with elevated triglyceride levels: Here, the EFSA statement on maintaining normal triglyceride levels starting from 2 g daily applies—a dosage that should be medically supervised.
• Very physically active people: There is plausible but not yet definitively proven evidence of a supporting role for omega-3 in regulating inflammatory processes after intense exertion; however, there is no specific EFSA statement on athletic regeneration for this.
• Older people: DHA is a structural component of nerve cell membranes; at the same time, special caution is advised in this group regarding high doses—see the BfR notes on immune function above.

Common myths about omega-3 in a fact check

Several claims circulate regarding omega-3 that go beyond what studies and official assessments actually support. For context:

• "Omega-3 cures depression." There is research on EPA and mood, but there is no EFSA-approved health claim regarding mental illness for omega-3 fatty acids. Depression is a serious condition that requires medical or psychotherapeutic treatment; no dietary supplement replaces that.
• "The more omega-3, the better for the heart." As the BfR limits and REDUCE-IT side effects show, the relationship is not linear; above certain doses, risks such as bleeding tendency and atrial fibrillation increase.
• "Omega-3 capsules work immediately." Since the omega-3 index builds up over the lifespan of red blood cells, noticeable or measurable changes can realistically be expected only after several weeks to months of regular intake, not after a few days.
• "Algae oil is fundamentally worse than fish oil." According to the EFSA, for the pure EPA/DHA effect, the amount consumed is decisive, not the source. Algae oil is simply often lower in dosage in practice and more expensive to produce, which keeps its market share smaller.
• "Fish oil capsule burps mean the product is bad." Mild burping can occur with any fish oil and depends, among other things, on taking it on an empty stomach or individual tolerance, but it is not a reliable quality marker in itself.

Fish oil, krill oil, or algae oil: What is the difference?

Fish oil from fatty sea fish is the classic and best-studied EPA/DHA source. Krill oil contains EPA and DHA in phospholipid form, which some manufacturers advertise as being more bioavailable; the evidence for this is currently inconsistent and not as extensive as it is for fish oil. Algae oil is the only relevant source for vegans, as microalgae are the actual primary producers of EPA and DHA in the ocean; fish only enrich these fatty acids through the food chain. Algae oil usually provides more DHA than EPA, whereas most fish oils have a more balanced or EPA-dominant ratio. Krill oil also frequently contains the carotenoid astaxanthin, which gives the oil its characteristic red color and provides antioxidant properties; according to EFSA assessment, an intake of up to 8 mg of astaxanthin daily is considered safe for adults, but there is no actual nutritional requirement for astaxanthin in humans. According to EFSA assessment, the source is of secondary importance for the pure efficacy on heart function, brain, and vision; the decisive factor is the amount of EPA and DHA actually consumed, not the carrier oil. Anyone who does not wish to use fish oil for ethical or dietary reasons should specifically look for an algae oil supplement with a stated EPA and DHA content per capsule.

Omega-3 index: How do you measure your own status?

The omega-3 index indicates the percentage of EPA and DHA out of all fatty acids in the cell membrane of red blood cells. Since these cells live for an average of about 120 days, the value reflects the average intake of the last eight to twelve weeks, similar to how the HbA1c value reflects blood sugar over a longer period. It is measured via a blood test, either at the doctor's office or as a self-test using a dried blood spot card.

A test does not replace a medical consultation but provides an objective basis instead of choosing a dosage based solely on intuition. Studies from Germany suggest that a relevant part of the population is in the suboptimal range of 4 to 8 percent, which underscores the fundamental sense of needs-based supplementation without deriving a blanket recommendation for maximum doses.

How and when should you take omega-3 capsules?

EPA and DHA are fat-soluble; therefore, absorption in the intestine works significantly better if the capsule is taken with a meal containing some fat. Taking them on an empty stomach is not fundamentally wrong but noticeably lowers bioavailability. For daily doses over 1 g, splitting the dose into two meals (e.g., lunch and dinner) can improve tolerance and reduce possible "fishy burps," which occur in some people when taking a high single dose too quickly. Capsules should be stored in a cool, dry, and dark place; checking the refrigerator after opening also slows further oxidation. A simple everyday test for freshness: anyone who pricks a capsule and smells something clearly strongly fishy instead of neutrally oily is likely holding a product that is already significantly oxidized, regardless of what is on the label. Anyone who regularly takes additional vitamin D3 can combine both fat-soluble nutrients in the same meal; this does not save an extra capsule, but it does save an additional reminder step in daily life.

Omega-3 and joints: What is behind the inflammation argument?

Omega-3 supplements are often advertised in connection with joint discomfort, which is one of the reasons why many Omega-3 products, including those from Veyt, are tagged with the term "joints." The underlying mechanism is plausible: EPA is a precursor to so-called resolvins and protectins, which are endogenous messenger substances involved in the active resolution of inflammatory processes, whereas arachidonic acid from the Omega-6 series tends to supply pro-inflammatory messenger substances. Clinical studies on Omega-3 for rheumatoid arthritis show partially positive effects on symptoms such as morning stiffness and joint pain scores, but the results are inconsistent, often based on small study groups, and no EFSA-authorized health claim specifically for joint health exists for EPA and DHA. Therefore, the only reliable phrasing is: a plausible, biochemically understandable mechanism with individual supporting studies, but without a blanket, officially verified efficacy claim. Those interested in additional herbal options for joint health can find further information in the Veyt guide on turmeric capsules, which assesses the studies on that subject in detail and with the same transparency.

Isn't eating fish enough?

The German Nutrition Society (DGE) recommends one to two fish meals per week, at least one of which should be a fatty variety such as salmon, herring, or mackerel. Those who consistently follow this often reach the 250 mg recommendation; however, according to nutritional reports, many people in Germany eat fish significantly less often than recommended. In these cases, supplementation is a logical option to close the supply gap without having to artificially increase fish consumption, which is not the preferred solution for everyone, including for sustainability reasons.

Conclusion: How much Omega-3 is really useful for whom?

In summary, the question of dosage cannot be answered with a single number, but depends on the goal. For the general maintenance of normal heart function, 250 mg of EPA and DHA daily is sufficient; this is the base dose recognized by the EFSA and a sensible starting point for most healthy adults. Pregnant and breastfeeding women benefit from an additional 200 mg of DHA; medically justified higher dosages from 2 g should be handled under medical supervision, not through arbitrary self-medication. The upper limit of 1.5 g from all sources, which the BfR suggests for long-term, unmonitored intake, is a useful guide for benefiting from the proven effects without taking unnecessary risks such as an increased tendency to bleed. Those unsure of their current supply levels can create an objective baseline with an Omega-3 index test instead of dosing by "feel" alone.

Frequently asked questions about Omega-3

Veyt Omega-3 in comparison

Sources: German Nutrition Society, Reference values for fat and essential fatty acids, Federal Institute for Risk Assessment, Omega-3 fatty acids: Important, but in moderation, Consumer advice center, Dosage of Omega-3 capsules. This article does not replace individual medical advice.