HUMAN NUTRITION

Detailed explanation-1: -Energy as kilojoules A kilojoule is a unit of measure of energy, in the same way that kilometres measure distance. Food energy used to be measured in Calories (Cal) and some countries still use those units. The conversions are as follows: 1 kJ = 0.2 Cal.

Detailed explanation-2: -The energy we get from food and drink is measured in kilojoules (kJ). This is the metric term for calorie. Kilojoules and calories represent the same thing. One calorie is about four kilojoules. You can easily convert from calories to kilojoules or vice versa.

Detailed explanation-3: -Food energy is expressed in calories or joules. A calorie is the amount of energy required at one atmosphere of pressure to raise the temperature of 1 g of water from 14.5°C to 15.5°C (NRC, 1981).

Detailed explanation-4: -Kilojoules are the metric measurement of calories. To find the energy content in kilojoules, multiply the calorie figure by 4.2. The label will usually tell you how many calories are contained in 100 grams or 100 millilitres of the food or drink, so you can compare the calorie content of different products.