ConsumerLab, which evaluates nutritional and health supplements, found that of 41 fish oil supplements tested, none were contaminated with mercury or PCBs.
Omega-3 supplements generally are made from fish oil, although they can be derived from algae. In fish-oil-based pills, the oil is distilled to filter out contaminants. Also the fish used to make pills tend to be younger and smaller than the fish we eat, meaning they have had less time to accumulate toxins.
"With all the news this year with mercury in this fish and dioxins or PCBs in that fish, people were concerned. So it put to rest in our minds the issue of purity," says ConsumerLab.com president Tod Cooperman.
Please Scroll Down to See Forums Below 
