Longevity Ninjas

Omega-3 Guide

EPA, DHA & Longevity · 8 min read

Omega-3 fatty acids are among the most researched supplements in existence — with thousands of studies supporting their role in cardiovascular health, brain function, and inflammation reduction. But most people take the wrong dose, the wrong form, or the wrong ratio.

Key Takeaways

  • EPA reduces inflammation; DHA supports brain structure — you need both.
  • Most people need 2-3g combined EPA/DHA daily, far above the typical supplement dose.
  • The omega-6:omega-3 ratio matters — modern diets are 15:1 (ideal: 2-4:1).
  • Triglyceride form absorbs 70% better than ethyl ester form — check labels.
  • Take with a fat-containing meal for dramatically better absorption.

EPA vs. DHA: Different Roles

Omega-3 is an umbrella term for several fatty acids. The two that matter most for health are EPA and DHA, and they serve different functions:

  • EPA (eicosapentaenoic acid): Primarily anti-inflammatory. Reduces CRP, supports cardiovascular health, and has antidepressant effects. Best for: inflammation, mood, and heart health
  • DHA (docosahexaenoic acid): Structural component of brain cell membranes and retinas. Critical for cognitive function, memory, and visual health. Best for: brain health, cognition, and eye health
  • ALA (alpha-linolenic acid): Plant-based omega-3 from flax, chia, and walnuts. Conversion to EPA/DHA is only 5-10% — not a reliable primary source

How Much Do You Actually Need?

Most fish oil supplements provide 300-500mg combined EPA/DHA per capsule. Research supporting health benefits typically uses much higher doses:

  • General health: 1-2g combined EPA/DHA daily
  • Anti-inflammatory support: 2-3g combined EPA/DHA daily
  • Cardiovascular risk reduction: 2-4g EPA/DHA (the REDUCE-IT trial used 4g EPA)
  • Brain health and cognition: 1-2g with emphasis on DHA
  • Depression support: 1-2g with emphasis on EPA (≥60% EPA ratio)
  • This means 4-8 standard fish oil capsules — or 1-2 teaspoons of liquid fish oil

Form Matters: Triglyceride vs. Ethyl Ester

Not all fish oil is created equal. The chemical form dramatically affects how much your body actually absorbs:

  • Triglyceride (TG) form: Natural form found in fish. 70% better absorption than ethyl ester. Look for ‘TG form’ or ‘triglyceride form’ on labels
  • Ethyl ester (EE) form: Cheaper to produce, used in most budget supplements. Lower absorption and may cause more ‘fish burps’
  • Re-esterified triglyceride (rTG): Concentrated AND well-absorbed — the gold standard. Brands like Nordic Naturals and Carlson’s use this form
  • Phospholipid form: Found in krill oil. Good absorption but lower total EPA/DHA per serving — more expensive per gram

The Omega-6:Omega-3 Ratio Problem

Both omega-6 and omega-3 are essential fats — but the ratio between them matters enormously. Our ancestors consumed a ratio of roughly 1:1 to 2:1. Modern Western diets, loaded with seed oils (soybean, corn, canola), have pushed this to 15:1 or even 20:1. This imbalance promotes chronic low-grade inflammation — the driver of cardiovascular disease, metabolic syndrome, and accelerated aging. You can improve your ratio by both increasing omega-3 intake AND reducing omega-6 consumption from processed foods.

Best Food Sources of Omega-3

While supplements are often necessary to reach therapeutic doses, these foods provide meaningful omega-3 along with other nutrients:

  • Wild salmon (3oz): 1,500-2,000mg EPA/DHA — the gold standard
  • Sardines (1 can): 1,000-1,500mg — plus calcium from bones
  • Mackerel (3oz): 1,000-1,800mg — affordable and nutrient-dense
  • Anchovies (1oz): 500-700mg — great in sauces and dressings
  • Oysters (3oz): 500-700mg — plus zinc and B12
  • Aim for 2-3 servings of fatty fish per week as a baseline

Maximizing Absorption

How you take your omega-3 supplement matters as much as the dose:

  • Always take with a fat-containing meal — absorption increases up to 300%
  • Avoid taking on an empty stomach (poor absorption + fish burps)
  • Store in the fridge or freezer to prevent oxidation and rancidity
  • Check for a ‘best by’ date and third-party testing (IFOS certification)
  • Liquid fish oil provides more EPA/DHA per serving than capsules and is more cost-effective

The Bottom Line

Omega-3 supplementation (2-3g combined EPA/DHA daily) is one of the most evidence-supported interventions for longevity. Choose triglyceride form, take with food, and prioritize fatty fish 2-3x per week as a dietary foundation.

Educational content, not medical advice. Talk with your doctor before starting any protocol — full medical disclaimer.