Delayed insulin secretion is not necessarily diabetic; it is also possible that the patient has a pre-diabetic problem. Clinically, the insulin secretion capacity of type 1 diabetes is very low and generally requires lifelong supplementation with exogenous insulin, whereas type 2 diabetes is often accompanied by both insufficient insulin secretion and/or insulin resistance. Therefore, patients with type 2 diabetes tend to have delayed peak insulin secretion, which can easily lead to hypoglycemia at the next meal. For patients with prediabetes, although it does not constitute a diagnosis of diabetes, patients often have increased insulin secretion, manifested by hyperinsulinemia, and delayed peak insulin secretion, at which point it is considered that prediabetes may be present. Patients with delayed peak insulin secretion should be diagnosed and treated in the endocrinology department of a regular hospital.