EP-5 Burn Your Calories

In a nutritional context, the kilojoule (kJ) is the SI unit of food energy, although the calorie is commonly used. The word calorie is commonly used with the number of kilocalories (kcal) of nutritional energy measured.
In the United States, most nutritionists prefer the unit kilocalorie to the unit kilojoules, whereas most physiologists prefer to use kilojoules. In the majority of other countries, nutritionists prefer the kilojoule to the kilocalorie. US food labelling laws require the use of kilocalories (under the name of "Calories"); kilojoules are permitted to be included on food labels alongside kilocalories, but most food labels do not do so. In Australia, kilojoules are officially preferred over kilocalories, but kilocalories retain some degree of popular use.[18] Australian and New Zealand food labelling laws require the use of kilojoules; kilocalories are allowed to be included on labels in addition to kilojoules, but are not required.[19] EU food labelling laws require both kilojoules and kilocalories on all nutritional labels, with the kilojoules listed first.[20]
To facilitate comparison, specific energy or energy density figures are often quoted as "calories per serving" or "kcal per 100 g". A nutritional requirement or consumption is often expressed in calories or kilocalories per day.
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