Whilst that's true, you really shouldn't use that as the argument - the point being made is that your body's ability to use a calorie in one type of food is dif

Whilst that's true, you really shouldn't use that as the argument - the point being made is that your body's ability to use a calorie in one type of food is different to your body's ability to use a calorie in another type of food. A calorie = a calorie, but accessing it, sorting it, and storing it, depends on the package it comes in.