Why do you think someone would want to keep eating plain ice throughout the day?
I heard once that it had something to do with blood sugar, but I don't think so. I could be wrong. I like to eat ice when I'm in the particular mood to bite something
It may just be a habit like chewing gum or compulsively eating. The ice is certainly not as bad as munching on sweets all day long but unfortunately dentists will tell you chewing ice is really bad for your teeth,
When I was a teenager I ate ice all the time. I went t to the Dr. and he told me it was because I was iron deficient which the blood work proved. I had to take iron pills for a few months.
This is actually a form of Pica and it is due to nutritional deficiencies that give the body strange desires to eat or smell non-food items. Ice won't hurt you that much, hard on the teeth. Some people are drawn to detergents and all kinds of strange things. My friend had the ice chewing Pica throughout both pregnancies and it ended when her babies were born.
This keeps oxygen going to your system whenever you are out iin the heat! Its almost as good as drinking water too.
I never knew it was a form of pica...that's new information for me. There may be any number of reasons why someone chew on a cup of ice: the crunch; moisture due to dry mouth, (some people take medicine or have medical treatments in which their saliva glands have been affected); soothing nausea, (I had vertigo with nausea very badly and this helped immensely); giving up one habit and substituting this as a tool to stay free of the habit, (i.e. smoking).
And, some people enjoy chewing ice. Hope this gives you info to 'chew on'.
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