Sorry - I really don't follow what you are trying to get across - if someone eats 100gm of banana then they will have 20 gm of carbohydrates, which they will convert into sugar and absorb into their bloodstream - the fibre although counted as a carbohydrate is of little consequence, nor is any other food group. Banana is a high carb food in my opinion. I stick to under 10 percent carbs normally, and am normally very healthy but when ill the banana will be quite a hit to the metabolism.