We advise that people avoid eating all fish and seafood due to the risk of mercury toxicity. In fact, we regularly treat people suffering the effects of mercury toxicity. Thus, you can be assured that it is safe to take our cod liver oil. Now only is our cod liver oil sourced from the pristine waters of Norway, but it also goes through a multi-step purification process that ensures it is clean and nutritionally rich. To learn more about this, click here.