Not all diabetic patients are in a lean weight state; clinically, type II diabetic patients are of moderate or obese weight. This is because obesity can lead to insulin resistance, which is very closely related to the development of type II diabetes. Patients do not appear to be particularly thin in weight. Thin weight patients are seen in type I diabetic patients or autoimmune diabetic patients with adult onset, all of whom have higher blood glucose at the time of onset and are relatively thin in size, mainly due to very low insulin levels in the body, and are in a state of severe insulin deficiency. Because insulin itself has the function of promoting protein and fat synthesis, and low insulin level will weaken the function of promoting fat and protein synthesis, the patient will have a thin weight.