Salmon is a great source of many key nutrients, including selenium, phosphorus, and B vitamins. Salmon is particularly high in selenium, an important nutrient that is involved in DNA synthesis, thyroid hormone metabolism, and reproductive health.It’s also a great source of omega-3 fatty acids, a type of heart-healthy fat that can decrease inflammation and support brain health.Salmon is rich in vitamin B12, which is necessary for producing red blood cells and regulating the health of the central nervous system.