Re: what does fabric softener and wall paint have in common?
The proper medical name for an urge to eat inedible things is pica. It is believed that it is usually due to mineral deficiency. In a young woman, the most common mineral deficiency is anemia, lack of IRON.
A very rapid blood test can check your iron level. Might be worth considering. Or, you could just try an iron supplement. Don't take more than recommended, however, as excess iron can be toxic.