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Nutrition of Salmon Vs. Mackerel

by
author image Emma Cale
Emma Cale has been writing professionally since 2000. Her work has appeared in “NOW Magazine,” “HOUR Magazine” and the “Globe and Mail.” Cale holds a Bachelor of Arts in English from the University of Windsor and advanced writing certificates from the Canadian Film Centre and the National Theatre School of Canada.
Nutrition of Salmon Vs. Mackerel
Mackerel provide a rich source of omega-3 fatty acids. Photo Credit DAJ/amana images/Getty Images

Salmon and mackerel both provide significant amounts of omega-3 fatty acids; however, salmon does provide more, according to Dr. Bruce Holub, B.Sc., Ph.D., of the DHA/EPA Omega-3 Institute. Salmon and mackerel also provide sources of vitamin D, although salmon offers more. Nutritionally speaking therefore salmon is the better choice for these vital nutrients. Salmon also tends to be low in heavy metal contaminants, while some species of mackerel contain high amounts of mercury and need to be avoided.

Omega-3 Fatty Acids

Salmon and mackerel both offer good dietary sources of the omega-3 fatty acids eicosapentaenoic acid, or EPA, and docosahexaenoic acid, better known as DHA. A 100 grams serving of farmed Atlantic salmon however provides 2.15 grams of EPA and DHA combined, while the same serving of Pacific or jack mackerel nets 1.84 grams, according to the DHA/EPA Omega-3 Institute. Thus salmon is a better source for EPA and DHA.

Vitamin D

Oily fish such as salmon and mackerel provide one of the few dietary sources of vitamin D. According to the National Institutes of Health Office of Dietary Supplements, food sources of vitamin D remain scarce, the optimal source being sunlight. 3 ounces of salmon offers 112 percent of the recommended daily allowance for vitamin D, while the same amount of mackerel provides 97 percent. Therefore salmon remains the superior dietary choice of vitamin D.

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Health Benefits

Omega-3 fatty acids and vitamin D demonstrate the ability to positively affect numerous health conditions, particularly those related to cardiovascular disease onset. Research shows that EPA and DHA boost levels of the good cholesterol, HDL cholesterol, in the blood. EPA and DHA also decrease blood pressure and reduce inflammation. Finally, EPA and DHA minimize the risk of developing age-related macular degeneration, according to the University of Maryland Medical Center.

Pollutants

As a rule both salmon and mackerel contain negligible levels of heavy metal pollutants such as mercury compared to other species of fish. That said, one species of mackerel known as the king mackerel contains a good deal of mercury and needs to be avoided, according to the American Heart Association. King mackerel is a large predatory fish indigenous to the Gulf of Mexico and the South Atlantic. A reading of around 1 part per million of mercury in any species of fish is considered high, and king mackerel contains a 0.73 mean mercury level per parts per million. Stick to smaller species of mackerel to keep mercury intake within a safe range.

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