Omega-3 Fatty Acids: The Evidence-Based Complete Guide
EPA, DHA, and ALA demystified — what the research actually supports for heart health, brain function, and inflammation.
Understanding omega-3 fatty acids and supplementation is one of the highest-leverage investments you can make in your long-term wellbeing. This guide synthesises the current evidence into clear, actionable steps.
What the Research Shows
Decades of research consistently demonstrate that small, consistent changes compound dramatically over time. The fundamentals matter far more than any single intervention.
Key Principles
- EPA and DHA (marine omega-3s) have robust evidence for reducing triglycerides and inflammatory markers.
- ALA (plant-based, found in flaxseed) converts to EPA/DHA at only 5–10% efficiency in humans.
- Target ratio: most evidence clusters around 2–4g combined EPA+DHA per day for therapeutic effects.
- Oxidised fish oil is worse than no supplementation — store in the fridge and check TOTOX values.
- Algae-based DHA is equivalent to fish oil and appropriate for vegans and vegetarians.
- Food sources: sardines, mackerel, salmon, and herring contain ~1–2g EPA+DHA per 100g serving.
Getting Started
Pick one principle from the list above and apply it consistently for 14 days before adding another. Behaviour change research shows that sequencing habits — rather than stacking them all at once — dramatically improves long-term adherence.
How to Measure Progress
Use our free tools to track your baseline and monitor improvements over time. Objective data beats subjective impression every time.
The Bottom Line
The evidence is clear: evidence-based lifestyle changes produce meaningful, measurable improvements. Start small, stay consistent, and trust the process.
