type 2 diabetes, formerly known as adult-onset diabetes, mostly develops after the age of 35 to 40, accounting for more than 90% of diabetic patients. the ability of patients with type 2 diabetes to produce insulin is not completely lost. some patients even produce too much insulin, but the effect of insulin is poor. therefore, the insulin in the patient's body is relatively deficient and can be stimulated by certain oral drugs. secretion of insulin. however, some patients still need to use insulin treatment in the later stages.