It's also very difficult to count "calories in". Pop quiz question: how many calories are there in a gram of fiber? If you answered zero, you are wrong. The cor

It's also very difficult to count "calories in". Pop quiz question: how many calories are there in a gram of fiber? If you answered zero, you are wrong. The correct answer is "nobody knows". Check the wikipedia article https://en.m.wikipedia.org/wiki/Dietary_fiber https://en.m.wikipedia.org/wiki/Dietary_fiber "In some countries fiber is not listed on nutrition labels and is considered to provide no energy. In other countries all fiber must be listed and is simplistically considered to provide 17 kJ/g (4.1 kcal/g) (because chemically fiber is a type of carbohydrate and other carbohydrates provide that amount of energy). In the US, soluble fiber must be counted as 4 kcal/g (17 kJ/g), but insoluble fiber may be (and usually is) treated as not providing energy and not mentioned on the label."