A doctor uses a glucose meter to test a patient's blood sugar level. Photo Credit verve231/iStock/Getty Images. Keeping your body fueled requires sugar in the bloodstream and insulin, which is created in the pancreas. Insulin regulates your blood sugar, or glucose. Blood sugar levels that are higher than normal can have serious long-term effects on your health, but low blood sugar levels can quickly become a medical emergency. Carbohydrates supply the body with blood glucose.