Delayed insulin secretion is an occurrence mechanism of type 2 diabetes mellitus, which mainly refers to the delay in the peak of insulin secretion by pancreatic islet cells. The peak insulin secretion in normal people is usually 30 minutes to 60 minutes after meals. For type 2 diabetics, the peak of insulin secretion is delayed, usually after two or even three hours after a meal. Insulin’s main role is to lower blood sugar, and it is the only hormone in the body that can bring blood sugar down. If insulin secretion is delayed, it will lead to a rapid rise in blood sugar in a short period of time, which will cause damage to blood vessels, and then cause a series of cardiovascular and cerebrovascular diseases. Once insulin secretion is delayed, you should go to the hospital in time to improve the relevant examination, under the guidance of the doctor early targeted treatment.