Imagine a city of the future where cardiovascular diseases are rare exceptions: streets without sirens, clinics with empty waiting rooms, people able to think clearly, react quickly, and perform calmly well into old age. The key seems unassuming: the fine adjustment of our fatty acid balance. Those who manage the right fats' ratio protect their vessels, heart, and brain – thereby granting themselves precious years of high-quality life.

Omega-3 fatty acids are polyunsaturated fats that the body does not produce on its own. Therefore, we must obtain them through our diet. Three forms are central: ALAalpha-linolenic acid, primarily found in plants such as flaxseed and walnuts, EPAeicosapentaenoic acid, mainly found in fatty fish and algae, and DHAdocosahexaenoic acid, also in fish/algae; an important building block for the brain and retina. For vascular health, not only the absolute amount of Omega-3 matters, but also the ratio to Omega-6also essential fatty acids, found in many vegetable oils and heavily processed foods; in excess, they promote inflammatory processes. An unfavorable n‑6:n‑3 ratioratio of Omega-6 to Omega-3 acts pro-inflammatory and pro-oxidative – two drivers of premature vascular aging. ALA can be converted to EPA/DHA in the body, but only to a limited extent. Therefore, both plant-based sources and targeted EPA/DHA intake are relevant, depending on dietary patterns and goals.

A well-balanced n‑6:n‑3 ratio improves central risk pathways: lipid metabolism, inflammation, oxidative stress, and endothelial function, which is the inner lining of our blood vessels. In animal models, a low ratio (1:1 to 5:1) led to more favorable LDL cholesterol, fewer pro-inflammatory cytokines, and lower markers of oxidative stress; a high ratio (20:1) significantly worsened these markers – including signs of endothelial dysfunction such as increased vWF and E-Selectin ^[1]. In humans, a controlled dietary study showed that a diet richer in ALA from walnuts and flaxseed improved vascular reactivity: the flow-mediated dilation (FMD), a marker for endothelial health, increased by 34%; simultaneously, diastolic blood pressure and peripheral resistance decreased – both at rest and under stress ^[2]. For high performers, this means: better circulation, more stable blood pressure regulation, and resilient vessels – a quiet but measurable advantage for endurance, cognitive sharpness, and longevity.

The latest evidence paints a nuanced picture. A systematic review and meta-analysis of randomized controlled trials in people with cardiovascular diseases found that Omega-3 supplements between 0.3 and 4.7 g/day did not significantly change pulse wave velocity, a marker for structural arterial stiffness. At the same time, they improved the augmentation index – a measure of reflected pulse waves – and increased FMD, particularly with EPA/DHA compared to ALA. The data suggest a dose-dependent optimization; about 1,650 mg of EPA plus 750 mg of DHA per day might be relevant for vascular effects, although the quality of evidence remains moderate to low, and more precise studies are needed ^[3]. Additionally, controlled dietary interventions without pills show that ALA-rich foods perform well: In a randomized crossover design, walnuts, walnut oil, and flaxseed oil improved FMD, lowered diastolic blood pressure, and reduced peripheral resistance – even under acute stress. This supports practical, culinary ways to enhance endothelial function, independent of pharmacological doses ^[2]. Animal data fill the gap regarding mechanisms: a favorable n‑6:n‑3 ratio dampens inflammation and oxidative stress and stabilizes endothelial markers – a plausible biological pathway linking nutrition and vascular function ^[1]. Taken together, the research provides a consistent signal: dietary patterns that strengthen Omega-3 and avoid excessive Omega-6 imbalance improve dynamic vascular parameters – measurable, relevant to everyday life, and potentially effective for longevity.

- Reduce industrially processed snacks, fast food, fried products, and oils with very high Omega-6 content (e.g., corn, sunflower, soybean oil). Aim: to normalize the n‑6:n‑3 ratio to lower inflammation, oxidative stress, and endothelial dysfunction ^[1].
- Incorporate Omega-3 plant sources daily: 1–2 tablespoons of ground flaxseed in breakfast or 30 g of walnuts as a snack. Studies show better FMD, lower diastolic blood pressure, and reduced peripheral resistance with ALA-rich patterns ^[2].
- Prioritize EPA/DHA if your dietary pattern includes little fish: 2–3 portions of fatty sea fish per week or – in case of low fish intake – a quality-controlled supplement. Meta-analyses indicate vascular benefits and a possible dose target of about 1,650 mg EPA + 750 mg DHA/day for endothelial functions; adjust dosage and tolerance individually ^[3].
- Avoid the reflex to ignore supplements outright. In the case of an unbalanced diet, EPA/DHA preparations can fill the gap and improve vascular markers; have your Omega-3 status and cardiovascular risk assessed by a doctor ^[3].

The coming years will clarify which groups of people benefit the most from specific EPA/DHA doses and how dietary patterns versus supplements can be optimally combined. More precise studies with standardized biomarkers and target areas (e.g., FMD, AIx) could establish personalized Omega-3 strategies for prevention and high performance.