Why do you crave food when your blood glucose is high? Without enough insulin, your blood glucose rises above “normal” levels. Blood glucose levels above 140 mg/dL are considered high—also known as hyperglycemia. The higher your blood glucose rises, the louder those cravings and hunger pangs might become. While you’d think your body and your brain ought to be satisfied by the excess sugar in your bloodstream, it’s not that simple. Without enough insulin, your brain cannot make use of that glucose. Since the brain relies on a second-by-second delivery of sugar for fuel—and your brain doesn’t