Question

One of the reasons we eat food is to gain energy. How can we calculate the amount of energy that a food contains?

Answer 1

By calculating the total calorific value of each food ingredients

Step-by-step explanation:

Food’s energy content is due to its calorific values or the amount of calories it it. Carbohydrate, protein and fat are the major constituents of a food. Suppose, the amount of carbohydrate, protein and fat intake in an adult is equal to X, Y and Z grams

In one gram of carbohydrate , protein and fat there are 4 , 4 and 9 calories per gram

Thus, the total calories in the food of adult will be equal to

`(X * 4 + Y * 4 + Z* 9)` calories