Both haddock and cod are healthy, but cod may be better for blood pressure and heart health due to its lower sodium content and higher omega-3 fatty acids.

Cod liver oil comes from cod, while fish oil is taken from various fatty fish. Both are good sources of omega-3s and can help support heart health.

Both fish are nutritious and low in fat, but small differences in vitamin B12, sodium, and omega-3s may influence which one is better for your health goals.