This is unreal! My coworker was fussing AGAIN about me chewing ice. She said its a sign of iron deficiency so I went on the internet to check it out. I started chewing ice about 3 years ago and my iron has always been fine until recently. I give blood pretty regularly and the last time I tried to give my iron was too low. (Go figure) So I'll try to start back on my multivitamins and see if that helps with the ice chewing. And Sonic is the best for ice - fill it up and pour coke on it and I'm in heaven!