Fish oil and mercury

Everytime I eat fish I get symptoms of mercury detox. Weird spastic shaking, incoherent rambling nonsense at times and odd fits of rage.

Everytime I attempt to supplement with a fish oil I get this same problem. Even though these "higher grade" oils claim to have filtered and distilled out the impurities, including mercury, I still get this.

I think these companies are not telling the truth. I think there IS mercury in there, and they're just saying it's been filtered out.

Annoying.