From what I understand, 100 calories of bacon and 100 calories of sugar is the same. Though there are other compounds in those that may trigger effects in your

From what I understand, 100 calories of bacon and 100 calories of sugar is the same. Though there are other compounds in those that may trigger effects in your body. That said, how calories are measured is from an average approximation. It is true that different people may yield slightly more or less calories from the same foods. Calories are what your body extracts from the food post digestion. That said, I've never seen strong indicators that the maximum and minimum are that far apart. So it could be that you are a huge outlier and your body extracts way more calories from food A then the average person, or way less. But I think those chances are slim, that is, for you to be such an outlier.