Summary: fiber in with the foods you eat. Protein, fats and fiber, while having the advantage of no glycemic response, also work to bring DOWN the G.I. number of carb-containing foods when combined. For example, a rice cake (a typical diet food which has a G.I. number of 87) will spike your blood sugar quickly. But put some peanut butter on it and the number drops by 10 to 20 points.
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