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Mammals are unable to synthesize omega−3 fatty acids, but can obtain the shorter-chain omega−3 fatty acid ALA (18 carbons and 3 double bonds) through diet and use it to form the more important long-chain omega−3 fatty acids, EPA (20 carbons and 5 double bonds) and then from EPA, the most crucial, DHA (22 carbons and 6 double bonds). [2]
Just like fresh salmon, canned salmon is an excellent source of protein and omega-3 fatty acids — and very affordable at about $6.50 a can, says Largeman-Roth.
The previously mentioned report by the USDA observed that canned salmon has higher levels of calcium found in salmon bones and slightly higher levels of the omega-3 fat DHA.
An omega−3 fatty acid is a fatty acid with multiple double bonds, where the first double bond is between the third and fourth carbon atoms from the end of the carbon atom chain. "Short-chain" omega−3 fatty acids have a chain of 18 carbon atoms or less, while "long-chain" omega−3 fatty acids have a chain of 20 or more.
The level of omega-3 oils found in canned tuna can be highly variable, since some common manufacturing methods destroy omega-3 oils. [ 16 ] Australian standards once required cans of tuna to contain at least 51% tuna meat, but these regulations were dropped in 2003.
Salmon is a common food fish classified as an oily fish [1] with a rich content of protein and omega-3 fatty acids. [2] Norway is a major producer of farmed and wild salmon , accounting for more than 50% of global salmon production.
The tables below include tabular lists for selected basic foods, compiled from United States Dept. of Agriculture sources.Included for each food is its weight in grams, its calories, and (also in grams,) the amount of protein, carbohydrates, dietary fiber, fat, and saturated fat. [1]
[7] 3 ounces (85 g) of smoked salmon contains approximately 660 mg of sodium, while an equivalent portion of fresh cooked salmon contains about 50 mg. [7] Although high salt content prevents the growth of microorganisms in smoked salmon by limiting water activity, [7] the American Heart Association recommends limiting sodium consumption.