Ya, and kicking mercury out of the receptor sites is dangerous if your body is a poor excretor of mercury. ALA can still remove mercury from these same spots and it binds to the mercury, unlike iodine and selenium which would just bump the mercury into the bloodstream.

I do think higher doses are ok for a time if your body can handle them...but if you are reacting badly lower your dose because you are probably redistributing mercury which is a big no-no.