The development of the disease is closely related to insulin and the body's response to it. The hormone is the main participant in the metabolism of carbohydrates, namely, it is responsible for the absorption of glucose. This simple sugar is called a universal source of energy for the whole body. At the same time, some organs for its assimilation require the presence of insulin and are insulin-dependent (liver), others are able to do it directly, therefore they are called non-insulin-dependent (brain). After eating, the blood sugar level naturally rises. To bring it back to normal, the body gives the command to produce insulin, which helps the body absorb glucose and store its excess "in reserve" in the liver (in the form of glycogen), muscles and adipose tissue. In diabetes, this sequence of actions fails. As a result, cells and organs experience energy hunger, and almost all sugar continues to circulate in the blood without undergoing metabolic transformation, which provokes the phenomenon of hyperglycemia.