You might be toxic as a result of wastes produced by candida or by parasites. Are you taking molybdenum? If not, it might be a good idea to take 500 mcg a day. Molybdenum is necessary for the enzyme that breaks down aldehydes, which is a waste product made by candida. Molybdenum also is necessary for the enzyme that breaks down sulphites.

http://lpi.oregonstate.edu/infocenter/minerals/molybdenum/