Calories, kilocalories, kilojoules : In nutritional contexts, the kilojoule (kJ) is the SI unit of food energy. However, calorie and kilocalorie are still in common use. In these contexts, confusingly, the word "calorie" and "kilocalorie" refer to equivalent units (the former to the large calorie and the latter to 1000 small calories). Sometimes, in an attempt to avoid confusion, the large calorie is written as "Calorie" (with a capital "C"). This convention is not always followed, and not explained to the average person clearly. These quantities are often used for the total amount of food energy (e.g., in a meal) and for the specific energy, namely amount of energy per unit of mass (e.g. "calories per gram", "calories per serving"). Nutritional requirements or intakes are often expressed in calories per day.
Posted on: Sat, 28 Sep 2013 16:37:14 +0000
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