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I had been hesitant to take the silver because of that, but maybe I should start getting that part of the SP going too?
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Die off might be brutal, and you can not control die off, it just happens when it happens. Once you start chelating you can't do it since a small bit of silver is needed to activate the next dose of silver and DMSA will take that out.
NOTE: Untested and with one search you get 3 opinions from each page...