A recent study found that farmed Atlantic salmon were often contaminated with pollutants. Feeding mice these salmon resulted in insulin resistance and obesity. Mice fed farmed Atlantic salmon without pollutant residues did not develop these health problems. The researchers who conducted this study wrote, "Our data indicate that intake of farmed salmon fillet contributes to several metabolic disorders linked to type 2 diabetes and obesity, and suggest a role of POP's (Persistent Organic Pollutants) in these deleterious effects. Overall, these findings may participate to improve nutritional strategies for the prevention and therapy of insulin resistance."
This study reveals why GNLD tests their Salmon Oil Plus product for over 250 pollutants with a standard of none detectable. I do not know of another company which does such thorough testing to make sure that their omega-3 product is toxin free. Attention to toxicological issues such as pesticides and GMO's makes a difference!
Reference:
Ibrahim, Mohammad, et al., Chronic consumption of farmed salmon containing persistent organic pollutants causes insulin resistance and obesity in mice, PLOS, September 23, 2011.
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