You need to know whether it is farmed salmon, Atlantic salmon or wild salmon. Wild salmon is your best bet. A lot of questions have raised about the toxicity of Atlantic salmon and farmed salmon. Also, farmed salmon doesn't have as much A
All sockeye is wild; they cannot farm that species. Farmed salmon is much inferior to wild salmon, both in terms of omega-3 content and toxic load. Another interesting fact about sockeye is that it eats lower on the food chain, consuming mainly insects and algae, so it accumulates fewer environmental toxins than other species of salmon. “What about farmed versus wild? Well, the report that most refer to is the 2003 study done by the Environmental Working Group. EWG tested farm salmon and found that "seven of 10 farmed salmon purchased at grocery stores in Washington D.C., San Francisco and Portland, Ore., were contaminated with polychlorinated biphenyls (PCBs) at levels that raise health concerns." Additionally a study published in the journal Science in 2004 analyzed more than 2 metric tons of farmed and wild salmon from around the world and found that the concentrations of PCBs were "significantly higher in farmed salmon than in wild. European-raised salmon have significantly greater contaminant loads than those raised in North and South America." To be extra careful, trim the skin and fat, and grill or broil your salmon to reduce excess fat, which is where PCBs are stored.” (Charles Stuart Platkin, “Salmon Should Be A Dinner Staple,” The Daily Journal, June 21, 2010) Also, take a look at http://www.order-salmon.com/salmon-global-warming-salmon-climate-change.php