Why knowing how your food gets to your plate makes a world of difference! –
For starters, farmed salmon subsists on a different diet from wild salmon. Some salmon farms give their fish food that it would not ordinarily find in the ocean, such as fishmeal and fish oil, chicken meal, grain, and vegetable protein such as soy. The result: salmon that contains more calories and unhealthy omega-6 fatty acids than the wild variety.
Graeme Bradshaw, a homeopath and naturopath, and founding director of Integrated Medicine Institute in Central and Discovery Bay, says there are significant differences in nutrition composition between wild and farmed salmon. He cites the United States Department of Agriculture National Nutrient Database for Standard Reference 21, which states that a 198g portion of wild salmon contains just 281 calories, compared to 412 calories for the same amount of farmed salmon.
The farmed variety also contains more than twice the amount of fat found in the wild variety (27g versus 13g), more saturated fat (6g versus 1.9g), and more omega-6 fatty acids (1944mg versus 341mg). Both varieties have almost equal amounts of protein and cholesterol. “Selenium levels are also twice as high in wild salmon compared to farmed salmon – 110mcg versus 50mcg,” Bradshaw adds. “Selenium is desirable in fish as it antidotes mercury, a toxin that can often be found in seafood.”