Omega-3 fatty acids are a family of polyunsaturated fats that are essential — your body cannot produce them efficiently, so they must come from your diet or supplementation. The three main omega-3s are ALA (alpha-linolenic acid, found in plant sources like flaxseed), EPA (eicosapentaenoic acid), and DHA (docosahexaenoic acid). EPA and DHA are the biologically active marine forms found in fatty fish and fish oil supplements, and they are the ones that matter most for health.
Here is why that distinction matters: ALA conversion to EPA and DHA in the human body is extremely limited — typically less than 5–10%. This is why direct EPA and DHA supplementation is emphasised across the longevity and health science community. DHA is a major structural component of cell membranes, particularly in the brain and retina, while EPA plays a key role in regulating inflammation, as outlined in a review of EPA, DPA, and DHA.
If you live in Cyprus and follow a traditional Mediterranean diet, you might assume you are getting enough omega-3. In many cases, that assumption is wrong. Unless you are eating fatty fish — salmon, sardines, mackerel — multiple times per week, you are likely falling short of the EPA and DHA levels associated with meaningful health benefits. An updated review confirms the broad role these fatty acids play across multiple body systems, from cardiovascular function to brain health.
The case for omega-3 in a longevity context is built across several domains: cardiovascular health, brain function, inflammation, mood, and overall mortality risk.
A pooled analysis found that higher blood omega-3 levels are associated with lower risk of all-cause mortality. The Framingham Heart Study reinforced this, showing that a higher Omega-3 Index — a blood test measuring the percentage of EPA and DHA in red blood cell membranes — is linked to reduced cardiovascular and all-cause mortality. An Omega-3 Index of 8% or above is generally considered cardioprotective.
This is one reason omega-3 remains a core longevity supplement rather than a niche add-on. In Outlive:
“Finally, unless they are eating a lot of fatty fish, filling their coffers with marine omega-3 PUFA, they almost always need to take EPA and DHA supplements in capsule or oil form.”
That recommendation sits alongside his broader view that omega-3s are structurally important across the entire body. On his podcast, Attia said:
Beyond Attia, other longevity-focused experts also treat omega-3 as foundational because of its long-term health effects. Huberman has described EPA and DHA, while Bryan Johnson includes omega-3 rather than an optional add-on. Professor David Sinclair, geneticist at Harvard University, added fish oil, which reinforces how widely omega-3 is viewed as a baseline intervention in the longevity space.
The evidence behind omega-3 supplementation varies by health outcome, but in several key areas it is strong enough to inform practical decisions.
This is where the evidence is most robust. A systematic review published in eClinicalMedicine (The Lancet) found moderate certainty of evidence favouring omega-3 fatty acids for reducing cardiovascular mortality and outcomes. EPA-specific interventions showed more pronounced reductions than combined EPA+DHA.
A 2025 meta-analysis went further, finding that EPA was significantly associated with lower risk of fatal myocardial infarction (RR: 0.57), revascularization (RR: 0.73), and sudden cardiac death (RR: 0.75). A separate systematic review supports the association between blood omega-3 levels and reduced cardiovascular risk.
A dose-response meta-analysis covering 24 studies and 9,660 participants found beneficial effects on executive function, particularly within the first 12 months of supplementation. The evidence is stronger for people with mild cognitive impairment than for those who are cognitively healthy — which means omega-3 may matter more as you age and cognitive maintenance becomes a priority.
EPA-predominant omega-3 formulations have shown consistent benefits for depressive symptoms. A meta-analysis on depression found that formulations with EPA ≥60% of total omega-3 at doses up to 1 g/day had beneficial effects. A 2023 systematic review confirmed significant reduction in depression severity with high-EPA interventions at doses of 1–2 g/day.
An umbrella meta-analysis — covering 148 trials for CRP, 86 for IL-6, and 73 for TNF-α — found that omega-3 supplementation can meaningfully improve these key inflammatory markers across a range of health conditions.
Not every claim about omega-3 is equally well supported. Cardiovascular evidence is the strongest. Cognitive benefits appear more relevant for those with existing mild impairment than for healthy young adults. Mood benefits are most clear with EPA-dominant formulations at specific doses. This is a supplement where the form, dose, and context matter — not just whether you take it.
Not all omega-3 supplements are created equal. The form your fish oil comes in significantly affects how well your body absorbs and uses it.
The two main supplemental forms are triglyceride (TG) — including re-esterified triglyceride (rTG) — and ethyl ester (EE). TG and rTG mimic the natural molecular structure found in fish. EE is a synthetic form created during the concentration process and is cheaper to produce.
A pharmacokinetic study established the bioavailability hierarchy: free fatty acid (FFA) is the most bioavailable, followed by triglyceride (TG), then ethyl ester (EE). Since FFA forms are highly susceptible to oxidation, TG and rTG are the practical best choice for supplementation. A 16-week trial confirmed that rTG forms are more bioavailable than ethyl ester. Ethyl ester supplements also require a high-fat meal for adequate absorption, while TG forms absorb well regardless.
Huberman has recommended TG form for better absorption, noting that ethyl ester forms require food for effective uptake. Both Huberman and Dr. Rhonda Patrick have emphasised that triglyceride-form fish oils are meaningfully more bioavailable.
Beyond the molecular form, look for IFOS certification. The IFOS programme (International Fish Oil Standards) independently tests for active ingredient content, contaminants (heavy metals, PCBs, dioxins), and oxidation stability. Key freshness markers to check: peroxide value below 5 meq/kg, anisidine value below 20, and TOTOX (total oxidation) value below 26.
In short: look for TG or rTG form, IFOS certified, with verified low oxidation markers. This is the specification that separates a quality omega-3 from a generic fish oil capsule.
For general longevity and health support, the evidence-backed range is 1,000–2,000 mg of combined EPA+DHA per day. This aligns with recommendations from multiple leading longevity experts and the dosing used in the most relevant clinical trials.
Attia targets 12%, taking approximately 2.5 grams of EPA and 1 gram of DHA daily. His approach is based on regular blood testing through OmegaQuant to confirm his levels are in the target range. Most people will not need to go as high as Attia’s personal dose — 1,000 to 2,000 mg of combined EPA+DHA is a strong, practical starting point for the majority of adults.
Huberman recommends 1–3 grams, with a particular emphasis on the EPA component for mood support. He has suggested a minimum of 1,000 mg EPA for mood-related benefits and at least 300 mg DHA daily for cognitive function. Blueprint protocol keeps it at 1,000–2,000 mg EPA+DHA daily.
Timing: Take omega-3 with a meal, ideally one that includes some dietary fat. This improves absorption for all forms, and is especially important if you are using an ethyl ester product.
Frequency: Daily. Omega-3 supplementation is not a one-off — it takes consistent daily use over weeks to months to meaningfully raise your Omega-3 Index.
Upper limit: Most health authorities consider up to 3 g/day of EPA+DHA safe for general use without medical supervision. Higher therapeutic doses (for example 4 g/day for triglyceride reduction) should be managed by a doctor.
Omega-3 is one of the simplest supplements to fit into a routine. Take your capsules with breakfast or dinner — whichever meal you are most consistent with. Morning or evening makes no meaningful difference as long as there is food involved.
If you are using softgels, a typical daily serving is 2–4 capsules depending on the EPA+DHA concentration of the product. Higher-concentration products mean fewer capsules. If you prefer liquid fish oil (often lemon-flavoured), take it directly off the spoon or mix it into food. Store liquid fish oil in the fridge after opening.
Omega-3 is especially relevant if you are not eating fatty fish — salmon, sardines, mackerel, anchovies — at least two to three times per week. For anyone focused on cardiovascular health, cognitive maintenance, mood support, exercise recovery, or general longevity, it belongs in the daily stack.
It pairs well with other foundational longevity supplements. Omega-3 is commonly taken alongside vitamin D and magnesium as part of a simple, evidence-based daily routine.
The omega-3 supplement market is one of the worst for misleading products. Knowing what to avoid is just as important as knowing what to buy.
This is the most common trap. A capsule labelled “1,000 mg fish oil” often contains only 180 mg EPA and 120 mg DHA — that is just 300 mg of active omega-3. To reach a meaningful 1,000–2,000 mg daily dose, you would need 4 to 7 of those capsules. A quality product provides at least 500–750 mg of combined EPA+DHA per capsule.
Many mass-market fish oil products use the cheaper ethyl ester form without disclosing it clearly on the label. As the research above shows, ethyl ester has lower bioavailability — especially if taken without a high-fat meal. If the label does not say “triglyceride form” or “rTG,” assume it is ethyl ester.
This is a bigger problem than most people realise. A oxidation study found that the majority of products tested exceeded recommended peroxide limits. GW research found that flavouring in fish oil supplements can mask rancidity — meaning a product can taste fine and still be oxidised. If your fish oil capsules smell strongly of fish when you open the bottle, that is a warning sign.
An NPR report highlighted that most fish oil products make health claims on their labels that are not well supported. Watch out for products labelled “1,000 mg omega-3” that include ALA from plant sources — ALA is far less effective than EPA and DHA for the benefits discussed in this article.
Products marketed as “omega 3-6-9” are unnecessary for most people. The average diet already provides more than enough omega-6. Adding omega-6 and omega-9 (oleic acid, which is abundant in olive oil) to a fish oil supplement provides no additional benefit and may worsen your omega-6 to omega-3 ratio.
Without independent testing, there is no guarantee of potency, purity, or freshness. Many budget products available in Cyprus pharmacies and supplement shops lack any form of third-party certification. IFOS certification is the gold standard for fish oil testing.
Many fish oil products available in Cyprus pharmacies and supermarkets are generic imported brands with low EPA+DHA concentrations, ethyl ester form, and no third-party oxidation testing. Before purchasing any omega-3 in Cyprus, check four things: (1) combined EPA+DHA per serving — not total fish oil weight, (2) form — TG or rTG preferred, (3) third-party certification — IFOS preferred, (4) freshness indicators or oxidation data.
Omega-3 supplementation at standard doses (1–3 g/day of EPA+DHA) is generally well tolerated. However, there are important considerations.
The most typical side effects are mild: fishy aftertaste or burps, and occasional gastrointestinal discomfort such as nausea, bloating, or loose stools. These tend to be worse with ethyl ester forms and with oxidised products. Using a triglyceride-form, IFOS-certified product — taken with food — reduces these issues significantly. Splitting the dose across two meals can also help.
A traditional concern with omega-3 supplementation has been increased bleeding risk, particularly for people on anticoagulant medication. However, updated evidence paints a more reassuring picture. A 2024 meta-analysis published in the Journal of the American Heart Association found that omega-3 supplementation was not associated with increased bleeding risk overall. A modest additional bleeding risk was noted only with high-dose purified EPA (icosapent ethyl), which is a prescription pharmaceutical product — not a standard supplement.
That said, if you are on warfarin or other blood thinners, inform your doctor before starting omega-3 supplementation.
Beyond anticoagulants, omega-3 may slightly lower blood pressure, which could have an additive effect if you are on blood pressure medication. This is generally mild but worth discussing with a healthcare provider if relevant.
Some large clinical trials have reported a small increased risk of atrial fibrillation (AFib) with high-dose omega-3 supplementation, particularly at doses of 4 g/day or above. This appears to be dose-dependent and is more relevant to prescription-strength dosing than to standard supplemental doses of 1–2 g/day.
As with any supplement, omega-3 does not replace a balanced diet and healthy lifestyle. This content is for educational and informational purposes and is not medical advice. If you are managing a medical condition, pregnant, breastfeeding, or taking medication, consult a qualified healthcare professional before starting supplementation.
If you have read this far, you already know more about omega-3 quality than most supplement buyers. Here is what it comes down to in practice.
When buying omega-3 in Cyprus, look for a product that meets these specifications:
This is exactly the specification that Longevity.cy stocks. The product has been selected to meet the criteria outlined in this article — the right form, the right dose, third-party tested, and available for delivery across Cyprus.
Most generic fish oil products on pharmacy shelves in Cyprus do not meet these standards. They tend to be low-concentration ethyl ester capsules with no third-party testing and no published oxidation data. The difference between those products and a properly specified omega-3 supplement is not marketing — it is bioavailability, purity, and whether you are actually getting the EPA and DHA your body can use.
Longevity.cy ships across Cyprus. If you want an omega-3 supplement that matches the evidence and specifications covered in this article, it is available at Longevity.cy.
