Foods have different energy, or caloric, values because they contain varying combinations and amounts of protein, fat, carbohydrate and water. For example, a 50 gram (VA ounce) serving of cauliflower supplies only seven calories while a wholemeal roll of the same weight provides 135.
MEASURING FOOD ENERGY The energy in the foods you eat is measured [...]
Doctors and nutrition experts tell you to eat a ‘balanced’ diet, but this does not mean eating the same amount of each type of food. You need to eat more of some foods than others to meet your body’s needs.
For a balanced diet, the variety of foods you eat should work in harmony with one [...]
How food is digested
The nutrients your body needs for energy, maintenance and repair - including amino acids, glucose, fatty acids, vitamins and minerals - must first be extracted from food by the process of digestion.
Digestion begins in your mouth as you chew the food you are eating to break it up into smaller pieces. Chewing [...]