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Everything we eat contains calories. We need them to function and carry out everyday tasks. How do we know which foods are right to eat and which contain 'empty calories'?Key facts
- Calories are in everything we eat and we need them to survive.
- A calorie is a unit of energy, and one thousand calories are equal to a kilocalorie.
- Energy content is also measured in joules and kilojoules.
- A healthy diet needs to balance the calorific and nutritional value of food.
Transcript
Calories are in everything we eat and we need them to survive. But what is a calorie?
Food is a store of chemical energy, and the calorie number reveals exactly how much energy is contained in the food we consume.
A calorie is a unit of energy. It is one thousandth of …
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