Mercury toxicity is hard to figure. Many millions of people
have had mercury amalgam fillings.Perhaps a tiny fraction of that number may have had toxic symptoms, but the evidence is scanty. In the early days of syphilis, some victims took horrendous doses of mercury compounds, and survived. Yet a couple years ago, a lady chemist spilled a mercury compound on her glove, and was dead in not many minutes. Obviously the structure of the mercury compound
absorbed makes an enormous difference.