20) Mackerel: 18.6 g Protein Per 100 g
Mackerel might not be as popular as more fashionable fish such as salmon and tuna, but it is just as healthy.
With a large concentration of omega-3, a wide range of vitamins and minerals, and a decent serving of protein; mackerel has an excellent nutrition profile.
A typical 112-gram fillet of mackerel provides 21 grams of protein.
And that brings this list to an end.
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In addition to the many other benefits of protein, consuming higher amounts can help to improve satiety, support weight loss efforts, protect against bone/muscle loss, and build muscle.