Manganese mimics it
Exposure to this in its metal form superficially mimics Parkinsonism
If a chelationist has told you that you have "heavy metal poisoning" just from ordinary things, get a second opinion and be sure any labs come from someplace reputable. If you self-diagnose with a fad / scare "toxicity", you'll never feel well again and will remain under fringe care. The field cries out for better work. Cheers.