Digestion and Absorption
Calorific values of proteins, carbohydrates and fats
- The heat energy released by combustion of one gram of food is usually known as its gross calorific value. (Bomb calorimeter is used to measure it). calorific value of carbohydrate, proteins and fats are 4.1 Kcal/g, 5.65 Kcal/g, and 9.45 Kcal/g respectively.
- Physiologic value is the amount of energy produced on oxidation of 1 gm of food substance in the body. Physiologic value of carbohydrates, proteins and fats are 4.0 Kcal/g, 4.0 Kcal/g and 9.0 Kcal/g respectively. It is less than gross calorific value.
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