Question

Cite a way in which the energy value of foods is determined.

Answer 1

t uses a single factor for each of the energy-yielding substrates (protein, fat, carbohydrate), regardless of the food in which it is found. The energy values are 17 kJ/g (4.0 kcal/g) for protein, 37 kJ/g (9.0 kcal/g) for fat and 17 kJ/g (4.0 kcal/g) for carbohydrates.

Calculating Energy

Multiply grams of carbohydrate in the food by 4 calories per gram. ...

Multiply grams of protein in the food by 4 calories per gram. ...

Multiply grams of fat in the food by 9 calories per gram. ...

Add the energy from carbohydrate, protein and fat.