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An Omega-3 Index between 4% and 8% is the zone where most people who eat fish occasionally but not regularly land. Cardiovascular-outcome associations improve roughly linearly as the index climbs toward 8%, so while 6% isn't "bad," there's still headroom for improvement. People in this middle zone typically eat one fatty-fish meal per week, take a modest omega-3 supplement inconsistently, or rely partly on plant sources.
The Omega-3 Index is the percentage of your red blood cell membranes made of EPA and DHA, the two long-chain omega-3 fatty acids found mostly in oily fish. Unlike a single-day blood draw of omega-3s, the index reflects your intake over the past 3–4 months — the lifespan of a red blood cell — which makes it a much steadier reading. Population studies consistently find that people with an index below 4% have the highest cardiovascular mortality; people above 8% have the lowest. Most Westerners with no deliberate omega-3 intake sit in the 3–5% range. The typical causes of a low index are simple: little or no fatty fish intake, heavy seed-oil / omega-6 consumption which competitively crowds out omega-3s, or relying on flaxseed (ALA) sources which your body converts to EPA at only ~5–10% efficiency.
Two servings per week of fatty fish (salmon, sardines, mackerel, herring, anchovies) typically moves the index by ~2 percentage points over 3 months. If fish isn't your thing, a 1–2 g/day EPA+DHA supplement — algae-based if you want a vegan option — does similar work. Re-test at 3–4 months; before that the red cells haven't turned over enough to show the change.
Omega-3 Index: {{value}}% — low (ref: >{{low}}% target)An Omega-3 Index between 4% and 8% is the zone where most people who eat fish occasionally but not regularly land. Cardiovascular-outcome associations improve roughly linearly as the index climbs toward 8%, so while 6% isn't "bad," there's still headroom for improvement. People in this middle zone typically eat one fatty-fish meal per week, take a modest omega-3 supplement inconsistently, or rely partly on plant sources.
If you want to nudge this toward the 8%+ target zone, adding a second fatty-fish meal per week or a 1 g/day EPA+DHA supplement is the low-effort route. If you're already content here, no action is required — mid-range is a reasonable place to sit.
Omega-3 Index: {{value}}% — intermediate zoneAn index of 8% or higher is associated with the most favorable cardiovascular outcomes in large observational studies — lower rates of sudden cardiac death, better markers of inflammation, and generally healthier lipid behavior. Getting here reliably takes either regular fatty-fish intake (2–3 servings per week is typical) or consistent EPA+DHA supplementation. The index plateaus around 10–11% even with heavy supplementation, so climbing much higher than this isn't useful or documented to add benefit.
Excellent result — keep doing what's working. Re-test annually to confirm this drift hasn't set in. Very high intake (>4 g/day of EPA+DHA) can slightly extend bleeding time and interact with anticoagulants, so if you're on blood thinners, mention the dose to your doctor.
Omega-3 Index: {{value}}% — optimal (≥8%)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.