Magnesium is very important.Most Americans in general are magnesium deficient, and those who are mercury toxic are probably even more likely to be magnesium deficient. It is also important to take in enough salt. One article I read claimed that some causes of candida overgrowth are a high calcium/magnesium ratio(ie. a magnesium deficiency) and a high potassium/ sodium ratio(not enough salt intake). Sodium is necessary for hydrochloric acid formation, and those who are sodium deficient might not produce enough stomach acid(this in turn might make on succeptible to parasites, candida overgrowth, malabsorbtion of minerals, and other digestive problems.