7 Surprising Foods With More Omega-3s Than Salmon
When most people think of omega-3 fatty acids, salmon immediately comes to mind. And for good reason—this fatty fish is renowned for its high levels of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), two critical forms of omega-3s linked to heart health, brain function, and reduced inflammation. But what if you could get even more omega-3s from foods that aren’t fish at all?
Emerging research reveals several plant-based and alternative sources that, in certain forms or preparations, can rival or exceed salmon’s omega-3 content—particularly when measuring alpha-linolenic acid (ALA), the plant-based precursor to EPA and DHA. While the body converts ALA to EPA and DHA inefficiently, these foods still offer significant health benefits and are valuable additions to a balanced diet, especially for vegetarians, vegans, or those seeking dietary variety.
Here are seven surprising foods that contain more omega-3s than salmon—backed by current nutritional science and authoritative sources.
1. Flaxseeds (Ground)
Flaxseeds are among the richest plant sources of ALA. Just one tablespoon of ground flaxseeds provides approximately 2.4 grams of ALA—more than the total omega-3 content found in a typical 3-ounce serving of salmon, which contains about 1.5 grams of combined EPA and DHA.
Since the body must convert ALA to EPA and DHA (at a rate of roughly 5–10% for EPA and 2–5% for DHA), the direct equivalence isn’t one-to-one. Although, flaxseeds deliver a potent dose of ALA that supports cardiovascular health and inflammation modulation. Ground flaxseeds are preferred over whole, as the hard outer shell prevents digestion.
Source: National Institutes of Health Office of Dietary Supplements – Omega-3 Fatty Acids
2. Chia Seeds
Chia seeds have surged in popularity as a superfood, and for good reason. One ounce (about 2 tablespoons) of chia seeds delivers roughly 5 grams of ALA—more than triple the omega-3 content of an equivalent serving of salmon.
Beyond ALA, chia seeds are rich in fiber, protein, calcium, and antioxidants. Their gel-forming property when soaked makes them ideal for puddings, smoothies, and egg substitutes in baking. Regular consumption has been associated with improved lipid profiles and reduced blood pressure in clinical studies.
Source: Journal of the American Heart Association – Chia Seed Consumption and Cardiovascular Risk Factors
3. Hemp Seeds
Hemp seeds offer a balanced profile of essential fatty acids, including a notable amount of ALA. Three tablespoons of hemp seeds provide about 3 grams of ALA—exceeding the omega-3 content in a standard salmon serving.
What sets hemp apart is its ideal ratio of omega-6 to omega-3 fatty acids (approximately 3:1), which aligns with dietary recommendations for reducing chronic inflammation. Hemp seeds similarly contain all nine essential amino acids, making them a complete plant-based protein source.
Source: National Library of Medicine – Nutritional and Health Benefits of Hemp Seeds
4. Walnuts
Among tree nuts, walnuts stand out for their exceptionally high ALA content. A quarter-cup (about 14 halves) of walnuts contains roughly 2.5 grams of ALA—more than the omega-3s in a 3-ounce salmon fillet.
Walnuts have been extensively studied for their cardiovascular benefits. Regular consumption is linked to improved endothelial function, lower LDL cholesterol, and reduced risk of heart disease. Their unique polyphenol content also contributes to antioxidant and anti-inflammatory effects.
Source: Circulation – Walnut Consumption and Cardiovascular Health
5. Algal Oil
For those seeking a direct, plant-based source of EPA and DHA—without relying on fish—algal oil is a game-changer. Derived from marine algae, the original source of omega-3s in the fish food chain, algal oil provides preformed EPA and DHA in concentrations that can match or surpass salmon.
Studies demonstrate that algal oil supplementation effectively increases blood levels of DHA and EPA, making it a viable alternative for vegetarians and vegans. One teaspoon of high-potency algal oil can deliver 400–500 mg of combined EPA and DHA, with some formulations offering even more.
Source: Journal of Lipid Research – Algal Oil as a Vegetarian Source of DHA
6. Edamame (Soybeans)
While not as dense in omega-3s as seeds or nuts, whole soybeans like edamame contain a meaningful amount of ALA. One cup of cooked edamame provides approximately 0.6 grams of ALA—though less than salmon per serving, it contributes meaningfully to daily intake, especially when consumed regularly.
More importantly, soy foods offer a complete protein profile, fiber, isoflavones, and other phytochemicals that support heart and hormonal health. Fermented soy products like tempeh may enhance nutrient bioavailability.
Source: NIH Office of Dietary Supplements – Omega-3 Fatty Acids
7. Seaweed and Algae (Whole Food Forms)
Certain types of seaweed, particularly nori, wakame, and kombu, contain tiny but measurable amounts of EPA and, in some cases, DHA. While the levels are lower than in salmon, algae are unique as the only plant-based foods that naturally contain these long-chain omega-3s.
Incorporating seaweed into soups, salads, or snacks adds not only omega-3s but also iodine, tyrosine, and various vitamins and minerals. Some algae species, like schizochytrium, are cultivated specifically for omega-3 production and used in supplements and fortified foods.
Source: Marine Drugs – Omega-3 Fatty Acids in Edible Seaweeds
How to Maximize Your Omega-3 Intake
To get the most benefit from these foods:
- Grind flaxseeds before eating to unlock their nutrients.
- Store chia, flax, and hemp seeds in the refrigerator to prevent oxidation.
- Choose cold-pressed, refrigerated algal oil for maximum potency.
- Pair ALA-rich foods with nutrients that support conversion, such as zinc, magnesium, and B vitamins.
- Consider combining plant sources with algal oil if you seek direct EPA and DHA without fish.
Key Takeaways
- Flaxseeds, chia seeds, hemp seeds, and walnuts each provide more ALA per serving than salmon provides in total omega-3s (EPA + DHA).
- Algal oil offers a vegan source of preformed EPA and DHA that can match or exceed salmon’s levels.
- While ALA conversion to EPA and DHA is limited, these plant foods still reduce inflammation and support heart health.
- Diversifying your omega-3 sources ensures broader nutrient intake and accommodates various dietary preferences.
Frequently Asked Questions
Can I get enough EPA and DHA from plant sources alone?
The body converts ALA to EPA and DHA inefficiently, so relying solely on flaxseeds or walnuts may not meet optimal needs for these critical fatty acids. Algal oil is the most effective plant-based way to obtain direct EPA and DHA.
Is it dangerous to consume too many omega-3s?
Excessive intake (typically above 5 grams per day) may increase bleeding risk or affect immune function in some individuals. However, reaching such levels through whole foods is unlikely. Supplements should be used under guidance.
How does cooking affect omega-3 content in these foods?
Omega-3 fatty acids are sensitive to heat and oxidation. To preserve content, avoid prolonged high-temperature cooking. Add ground flax or chia to smoothies, oatmeal, or baked goods after cooking when possible.
Are there any risks associated with algal oil?
Algal oil is generally recognized as safe (GRAS) by the FDA. Side effects are rare but may include mild gastrointestinal discomfort. Choose third-party tested products for purity.
While salmon remains a nutritious choice, these seven foods demonstrate that powerful omega-3 benefits aren’t limited to the sea. By incorporating a variety of seeds, nuts, soy, and algae into your diet, you can support your health with sustainable, nutrient-dense options—whether you eat fish or not.
As always, consult with a healthcare provider or registered dietitian to tailor your omega-3 intake to your individual health needs, especially if you have underlying conditions or are pregnant.