negative calories from cold

... forty push-ups or an ounce of water-ice? ...

Our warm-blooded bodies heat up cold food as it's metabolized, and this requires energy. Frozen foods further require that you put heat energy into melting, before its temperature will increase. The calculation for foods with thermal properties like that of H2O, outlined below and earlier by Paul Horowitz, shows that a cup of ice requires nearly 28 food Calories to bring it up to body temperature (about 98.6 F or 37 C). As indicated, this is the Calorie equivalent of quite a few push-ups.

Caution: Consider the source, as this page was put together by mathematicians and physicists, rather than by nutritionists or dentists who might know something about the disadvantages of cold food. Please let us know if there are things we might or should modify in this regard.
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