Mercury Amalgams and Toxic Root Canals

Am one with advanced adrenal fatigue (Stage 3) and am now to the point that need to have a root canaled tooth that is painful and another one that is very sensitive cleaned up as WBC count is dropping, etc. Also am considering when seeing biological dentist beginning the process of removal of mercury amalgams. However, I am allergic to sulfur therefore cannot detox post removal of mercury amalgams with DMSA or sulfur products. My questions are:
1) would alpha lipoic acid suffice in removal of mercury from body post mercury amalgam removal?
2) Would liposomal glutathione be an adequate and suitable alternative to DMSA to remove mercury from body?
3) Is it true tha plain alpha lipoic acid is the only substance that will remove mercury from the brain?

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