Farmed salmon are very different to humans with respect to cardiovascular disease.

The classic atherosclerosis we see in humans is very rarely identified in salmon, although it is common to find arteriosclerosis in wild salmon and farmed salmon. The prevalence of arteriosclerosis has been well documented and it increases with the age of the fish.

Viral disease leads to a higher incidence of cardiovascular disease in farmed fish.

Correct nutrition can make the heart more resilient to disease. For example, the severity of one viral-induced heart disease, cardiomyopathy (CMS), is linked to the amount of the amino acid histidine in the heart. This is a promising causal relationship that must be studied in more detail.

Vegetable oils

Vegetable oils affect the composition of fatty acids and lipids in the heart, but no correlation has been identified between vegetable oils in the feed and changes in the prevalence of arteriosclerosis and atherosclerosis in farmed salmon.

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