So here's the fiber to carb ratio system. Im sure you've heard of the glycemic index before. Foods that have a lower number, the better it is on your blood sugar As Ive studied the glycemic index, I noticed that the foods that are low on the glycemic index usually have a good amount of fiber compared to total amount of carbohydrates. Lets take white bread for example. It usually has something like 15grams of carbs with 1 gram of fiber. That's not a very much fiber to take care of all those carbs