It is a good source of vitamin D.

Fatty fish options like salmon and tuna are natural sources of vitamin D, an essential nutrient for bone health, immune function, and overall well-being. “It may surprise most to know that there are not many dietary sources of vitamin D. Americans get most of our vitamin D from fortification, artificially added vitamins, or dairy products and orange juice, but half of the U.S. is still deficient. Salmon and herring have the highest vitamin D content of most fish, with one 4-ounce serving of salmon containing 100 percent of your daily recommended needs,” says Moody.