If you weigh 140 pounds and have type 1 diabetes, 1 gram of glucose will raise your blood sugar about 5 mg/dl no matter what your blood sugar may be, because you cannot produce any insulin to offset the glucose. If you weigh twice that, or 280 pounds, 1 gram will raise your blood sugar only half as much. A 70-pound diabetic child, on the other hand, will experience double the blood sugar increase, or 10 mg/dl per gram of glucose consumed. Thus, the effect of ingested glucose on blood sugar is inversely related to your weight.