Omega-3 Index · low result
What does a low Omega-3 Index mean?
Short answer
The Omega-3 Index is the share of EPA and DHA in red-cell membranes — a three-month average of intake. Below 4% is associated with the highest cardiovascular risk in observational studies, 8% or above with the lowest; most Americans sit around 4–5%. It rises with fatty fish two to three times a week or EPA/DHA supplements, and takes three to four months to reflect a change.
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
What is the normal range for Omega-3 Index?
- age 18+: 8.00 – 12.0 %
Below 4% is associated with higher cardiovascular risk; the target is generally 8% or above.
Full reference table, citations and testing options: Omega-3 Index biomarker page.
What are the common causes of low Omega-3 Index?
- Low intake of oily fish (salmon, sardines, mackerel, herring)
- No EPA/DHA supplementation; plant omega-3 (ALA) converts poorly
- Diets high in omega-6 oils (mild dilution)
- Some genetic variants in fatty-acid metabolism
What symptoms go with low Omega-3 Index?
- None directly
- Dry skin and eyes, joint stiffness are sometimes attributed to low intake
What do clinicians usually check next?
- Two to three servings of oily fish weekly, or 1–2 g/day EPA+DHA; retest in 4 months
- Lipids, ApoB, hs-CRP for the broader cardiovascular picture
- Prescription EPA (icosapent ethyl) is a clinician decision for people with high triglycerides and cardiovascular risk
Follow-up tests available at TestWell: Heart & Body Inflammation Test (hs-CRP) ($34.99), C-Reactive Protein (CRP) ($26.99).
How do you recheck Omega-3 Index?
Prices are cash-pay; every order adds one $6 lab processing fee. Physician authorization is included; no insurance or referral needed.
| Test or panel | Type | Price | Fasting | Results |
|---|---|---|---|---|
| Longevity & Anti-Aging Panel | Panel · 13 tests | $239.99 | Yes | 3–7 business days |
| Healthy Aging Panel | Panel · 15 tests | $299.99 | Yes | 3–5 business days |
| Total Body Panel | Panel · 49 tests | $499.99 | Yes | 5–10 business days |
| Omega-3 Index | Test · 5 biomarkers | $69.99 | No | 7–10 business days |
Common questions
What Omega-3 Index should I aim for?
8–12% is the range associated with the lowest cardiovascular risk. Getting from 4% to 8% typically takes about 1–2 g/day of EPA+DHA for three to four months.
Does flaxseed raise the Omega-3 Index?
Barely — the body converts only a few percent of plant ALA to EPA and almost none to DHA. Algae-based DHA/EPA supplements work for people who don't eat fish.
Educational content, not a diagnosis. Lab results are one input; a clinician interprets them with your history and exam.