[im3w1l]

There seems to be a known link between cravings, especially for ice or soil, and iron deficiency.

http://archinte.jamanetwork.com/article.aspx?articleid=57792...

http://www.tandfonline.com/doi/abs/10.1080/08880010590896486

http://www.samj.org.za/index.php/samj/article/viewFile/358/3...

http://www.sciencedirect.com/science/article/pii/00029343829...