Changes in farmed salmon feed composition have reduced the omega-3 content of farmed salmon while raising questions about nutritional welfare in the fish themselves.
Farmed salmon diet composition affects both the nutritional value of the product for humans and the welfare of the fish themselves. Omega-3 fatty acids are not merely a human health consideration — they are essential for salmon immune function and anti-inflammatory capacity. Diets low in omega-3 may increase susceptibility to disease and inflammation in farmed salmon. The shift from fish oil to plant-based alternatives has been driven by sustainability concerns about ocean fish depletion, but the nutritional and welfare implications for the farmed fish require ongoing monitoring. Sustainable feed that maintains nutritional completeness for fish welfare as well as product quality is the goal.