Blood glucose insulin 3 hours after meal is close to the fasting level, which is a normal phenomenon. Human insulin secretion is a dynamic process, regulated by factors such as eating and blood glucose level, blood glucose basically returns to the fasting level about 3 hours after meal, insulin also returns to the fasting level accordingly. In type 2 diabetic patients, insulin levels may be high 3 hours after a meal due to insulin resistance and other reasons. In normal people, during the initial period after meals, blood glucose drops rapidly due to insulin secretion, while the negative feedback of the drop in blood glucose inhibits the continued secretion of insulin and promotes the secretion of glucagon, so that the blood glucose is basically restored to the fasting level 3 hours after meals, and the insulin is also restored to the fasting level accordingly. In summary, it is recommended that patients monitor insulin levels and blood glucose at the same time, and actively seek the advice of specialists.