Diabetes is a disease where insulin is not produced normally in the body, or, in the case of Type 1 diabetes, insulin is not produced at all. Diabetes can also be caused by the cells of the body resisting insulin. This results in blood sugar levels that can become too high or too low. Because of this, blood sugar levels must be controlled by specific diets and medicine. There are many fantastic diet plans that diabetics can enjoy and benefit from, as well as medical foods for diabetics that you can use to balance your glucose levels.