Diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is vital to your health because it's an important source of energy for the cells that make up your muscles and tissues. Too much sugar in your blood can lead to serious health problems. This week in the first installment of our All about Diabetes three-part series, learn more about what type 1 diabetes is, what causes type 1 diabetes, the symptoms and risks factors, and some statistics about type 1 diabete.