Omega-3 foods: the best sources and how much Omega-3 (ALA) each has
By Vita · fact-checked against NIH ODS
The best sources of the long-chain omega-3s (EPA and DHA) are fatty fish — salmon, herring, sardines and mackerel — while the plant omega-3 (ALA) comes from flaxseed, chia seeds, walnuts and canola oil. Your body converts only a little ALA into EPA and DHA, so oily fish (or an algae-based supplement for vegans) is the practical way to raise those. Here are the top sources and how much omega-3 each serving delivers, from the NIH.
Most adults need about 1.6 g of Omega-3 (ALA) a day (no upper limit is established). Before stacking supplements, run your dose through the free Safety Checker.
Best food sources of omega-3 (ala)
| Food | Omega-3 (ALA) per serving |
|---|---|
| Flaxseed oil | 7.26 g ALA per 1 tbsp |
| Chia seeds | 5.06 g ALA per 1 oz |
| English walnuts | 2.57 g ALA per 1 oz |
| Salmon, Atlantic, farmed, cooked | ~1.8 g EPA+DHA per 3 oz |
| Herring, Atlantic, cooked | ~1.7 g EPA+DHA per 3 oz |
| Sardines, canned in tomato sauce | ~1.2 g EPA+DHA per 3 oz |
| Canola oil | 1.28 g ALA per 1 tbsp |
Amounts from the NIH ODS Omega-3 (ALA) fact sheet. Serving sizes vary; treat these as typical, not exact.
Why omega-3 (ala) matters
Omega-3 fats are built into your cell membranes — especially in the brain and eyes — and help regulate inflammation and heart health, which is why they support mood, focus and cardiovascular wellbeing. Aiming for a couple of servings of oily fish a week, plus ALA-rich seeds and nuts, is a simple, food-first target.
Read the full Omega-3 (ALA) guide › — what it does, how much you need, and how much is too much.
Wondering if Omega-3 (ALA) is your gap?
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Omega-3 foods FAQ
Which foods are highest in omega-3?
For EPA and DHA, oily fish like salmon, herring, mackerel and sardines lead. For the plant omega-3 ALA, flaxseed oil, chia seeds, walnuts and canola oil are the richest.
Are plant omega-3s as good as fish?
ALA from flax, chia and walnuts is the essential omega-3, but your body converts under 15% of it into the EPA and DHA most research focuses on. Fatty fish, or an algae-based supplement for vegans, is the practical way to raise EPA and DHA.
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Educational, not medical advice. Per-serving amounts are typical values from the NIH and vary with brand, preparation and portion. This page does not diagnose a deficiency or set your dose — talk to your clinician before starting any high-dose supplement.