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Dear Travis

For our purpose: A calorie is a measure used to express the heat or energy value of food and physical activity. It is defined as the amount of heat necessary to raise the temperature of one kilogram (1 liter) of water one degree centigrade, from 14.5 to 15.5 C. More accurately termed a kilocalorie (kcal). Most mortals just use the term calorie.  I hope this helps you.

George L. Dixon, Jr. MD