While researching another topic I came across this excellent website written by a chiropractor on allergies and reactions to heavy metals and the symptoms.
Some of the heavy metals listed are:
Further down the page he lists symptoms and the the corresponding metals which can cause them. The headings for the sx's are:
speech and language deficits
Then the structural and functional abnormalities associated with various heavy metal toxins are listed further down the page.
And there's more.