Dd wants to take cod liver oil supplements but is worried abut contaminants

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Does anyone know where to buy cod liver oil made from farmed cod?

Help, please?

I thought it was purified anyway - might be worth checking.

I've tried googling, and so far have not found any manufacturer claiming to use farmed cod.

Anyone?

It's generally not considered a good thing to use farmed fish for supplements, so I'm not sure that you'll find any.

Is there anything in specific that DD is worried about contamination-wise? Would speaking to someone at Holland & Barrett or similar put her mind at rest? She just needs to get high-quality ones, and she should have nothing to worry about.