Insulin delay in glucose tolerance test refers to the delay of insulin secretion peak found in glucose tolerance test, which is commonly found in type 2 diabetes mellitus patients, and can be improved by improving lifestyle and medication, as follows: 1. Improvement of lifestyle: moderate exercise and lifestyle modification, avoiding the intake of high-fat and high-calorie foods and high-sugar foods, and at the same time increasing the amount of exercise to reduce weight gain. Weight control can better improve insulin resistance in the early stage of diabetes. 2. Drug therapy: such as metformin, acarbose, etc., to alleviate the delay in the peak of insulin secretion, which can better improve the insulin resistance and the symptoms of pre-diabetes. Patients with insulin delay in glucose tolerance test should not take medication on their own, and should consult their attending physician in time and under the guidance of the doctor.