Foods that cause blood sugar crashes Artificial pancreas device team can help you develop a treatment plan tbat involves diet changes, oFods, and medication, if needed, to help lower your blood sugar levels When treating a low, the choice of carbohydrate source is important. But how can you know what foods are best for your body? Important: If you have Foods that cause blood sugar crashes low blood sugars Fooxs to your sguar. Continue reading. Each of the following servings provides 15 dugar of carbohydrate. Note: The foods listed above are easily absorbed and will raise blood sugar levels quickly. Foods that contain protein or fat — such as chocolate, candy bars, ice cream, cookies, crackers and bread — don't raise blood sugar quickly enough.