I've had many, many people with mercury fillings have no problem in eliminating systemic fungal candida. If they had a mecury issue where their immune system was impaired by mercury, then chelating it may be a first step to ensure that the immune system wasn't being suppressed. There was a study done of workers who exposed to high levels of mercury that remained in their bodies months later that showed immune impairment. This study doesn't translate to someone who just has mercury fillings and a systemic fungal candida issue.