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The American Heart Association recommends 500 mg of DHA + EPA if you do not have heart disease. If you have heart disease the American Heart Association recommends consuming 1000 mg of DHA + EPA daily. Many of my patients eat a variety of fish each week. However, there are fish that have a high DHA + EPA content like Atlantic Salmon, Atlantic Herring, Tuna Bluefin, Mackerel (canned) with each of these containing 1000 mg of the DHA + EPA or more...... and then there are fish that have a low Omega 3 content (low DHA + EPA content). These fish include Orange Roughy, Farmed Catfish, Shrimp, Tilapia and Mahi-Mahi. Each of these contain 120 mg or less of DHA + EPA (your healthy Omega 3s).
Since there is such a difference in healthy Omega 3 content of common seafoods I thought it would be helpful to post a list of Omega 3 content of these foods. The listing is in mg of DHA + EPA content in a 3 oz serving.
Higher Omega 3s DHA + EPA
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Atlantic Herring 1712
Atlantic Salmon 1564
Tuna Bluefin 1279
Herring Pickled 1181
Mackerel (canned) 1046
Oysters (steamed) 850
Sardines (canned in oil) 835
Intermediate Omega 3s DHA + EPA
Swordfish 764
Rainbow Trout, farmed 744
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(canned in water) 733
Sockeye Salmon 673
Sea Bass 648
Salmon Pink 524
Crab Dungeness 501
Crab King 351
Walleye 338
Lower Omega 3s DHA + EPA
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Halibut 200
Northern Lobster (steamed) 165
Scallops (steamed) 149
Cod 135
Mahi-Mahi 118
Tilapia 115
Shrimp 87
Catfish, farmed 76
Orange Roughy 26
This information is taken from the USDA Nutrient Data Base for fish cooked with dry heat unless otherwise noted, and wild unless indicated as farmed.