An overloaded liver (due to candida) will keep the heavy metal 'stored' into bones and muscles - metabolic response to avoid death when it remains in the bloodsteam -

Liver is an issue
So is proper mineral balance (selenium- magnesium are essential to get rid of toxic wastes)

But first:
Any Amalgams containing mercury in your teeth?
Any toxic people surrounding you?

And then:
Metalloclear is the 'natural' chelator I have been using. I am not succesful yet but... getting there!

Jhan