In diabetes mellitus, glucose uptake from the blood to the body cells is impaired. The key for glucose uptake into each cell of the body is insulin. Without this key, the lock remains almost locked and consequently blood sugar levels remain high. Depending on the type of diabetes, there is either a total lack of insulin (type 1) because the pancreas cannot produce insulin, or the condition is called type 2 (diabetes mellitus), the so-called acquired diabetes. In these cases, there are several causes and various combinations of insulin resistance, hyperinsulinism, relative lack of insulin, and pancreatic secretion disorders are conceivable. Unless countermeasures are taken, the result is always the same: higher sugar level in the blood and urine.