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I don't mean to scare you but I am Norwegian and have heard of Shark Liver Oil. It is used in many treatments in Norway. I heard that it is an ambiguous drug. It can heal but it can also increase risks of cancer.
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Hi Raphael, I have had a look for any references to it increasing the risk of cancer, and the only thing I can find is that SLO (and any fish liver oil for that matter) has the potential to be contaminated with PCBs and other heavy metals, which are carcinogenic. So it depends where the shark has been feeding. For this reason I only buy New Zealand SLO, which is less likely to be contaminated. Obviously sharks travel, so this doesn't guarantee anything, I know!