1.drinking distilled water, see water debate forum
2.mineral depletion realated to too much cleansing
3.incomplete diet, vegetarians can have these problems, but anyone who is not getting proper ratio of nutrients required by the body will suffer as well
4.not enough research available to know for sure what oil pulling is leaching from the body, though it is toted to leach toxins...
My suggestion, work on enriching your mineral intake and correcting your diet to ensure proper nutrition.