Its definitely true. I never craved ice or even thought about chewing on ice until I became extremely anemic and since then I crave ice like crazy. I prefer certain types of ice (like Sonic, that crushed little pellet kind) but I will gnaw on any ice available. Its an awful craving and probably why I had to get the last crown I got but I can't help it. I've started breaking it up in the blender and basically eating it snowcone style (without the syrup) to make it easier on my teeth but I can't get away from it. When I first went to my doctor for the anemia he asked me how far I could walk without being out of breath and how long I had been craving ice. This was before he knew ANYTHING about me other than what my iron levels were (a new doctor I was referred to). I was shocked. I didn't realize it was a symptom of anemia before that. However, there are other things that can cause the cravings, like have been mentioned. Mine is definitely iron related. It gets better when my iron levels go up but every month around 'that time' they jump back down and the ice cravings get terrible again.