It&#x27;s also the fact that elemental mercury&#x27;s toxic side effects are really hard to quantify and see because it fucks up the central nervous system, and is of more psychological detriment. Note that this is elemental mercury, not methylmercury, which only happens from predatory bio-accumulation in fish.<p>Over the years OSHA has consistently been lowering their safe mercury exposure levels (blood tests), and it&#x27;s fast approaching &quot;No mercury exposure at all is best.&quot;<p>I used to work in a lab with a ton of mercury in it, and some lab workers who were quite liberal with their handling of mercury, and liberal over 20 years. I don&#x27;t know if they were crazy from the start, but I didn&#x27;t want to find out.