really on which part??

i just quickly pulled up some data and some lake fish can have as high as 10,000 ng per gram of fish. so yeah, that is more than the highest brand tested at a little less than 900 ng per daily exposure (you eat multiple ounces of fish, not grams). it looks like a lot of shellfish is in the 50-200 ng/g range, looks like even wild salmon ranges btween 3.9 and 8.1 ng/g wet weight so one could easily take in the amount in the oil. where are the class action lawsuits around those sources?

it looks like the highest one at 900ng is nothing to sneeze at but nothing to get super worried about. just use a molecularly distilled oil and you're good anyway.