Gross calorific value vs. physiologic value of food
The energy released by complete combustion of one gram of food is gross calorific value.
Gross calorific value of carbohydrates - 4.1 kcal/g
Gross calorific value of proteins - 5.65 kcal/g
Gross calorific value of fats - 9.45 kcal/g
The actual amount of energy liberated in the body from carbohydrates, proteins and fats is called physiologic value of food.
Physiologic value of carbohydrates - 4 kcal/g
Physiologic value of proteins - 4 kcal/g
Physiologic value of fats - 9 kcal/g


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