No kidding, that's news to me. More money quotes: Insoluble fiber does not change inside the body, so the body cannot absorb it and it provides no energy. Sol

No kidding, that's news to me. More money quotes: Insoluble fiber does not change inside the body, so the body cannot absorb it and it provides no energy. Soluble fiber is partially fermented, with the degree of fermentability varying with the type of fiber, and contributes some 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. So it's technically accurate that the human body cannot digest fiber, but bacteria in the gut can break soluble fiber down allowing us to extract some small amount of energy.