If a food is said to have 100kcal do we get all of those?

Question

If a banana is said to have 100kcal and you and I eat it are we going to get:

1. all of those calories?

2. the same amount of energy or it varies person to person?

In: Biology

Answer 1

Calorimeters measure how much energy is released from burning a piece of food. How much of that piece of food’s stored energy (in carbon bonds) being used for life functions will vary from person to person. It’s more of an average thing that you or a healthcare provider have to adjust for.