I don’t know much about parasites. But salmon, for instance, is supremely healthy because it contains the Omega 3 essential oils missing in our diets that can prevent many illnesses and cancers.
However, this is only true in WILD salmon. Farmed salmon contains the same old omega 6 oils that we have in too high a proportion in our diets already, because farmed salmon are fed a diet of GRAIN.
Not to mention orange dye and lots of other crap. I’ve instructed the SO that when shopping for salmon not to buy farmed salmon.