Blood sugar is mainly regulated by hormones, and the hormones that regulate blood sugar can be divided into those that lower blood sugar and those that raise blood sugar. 1. Lowering blood sugar: insulin is the only hormone that lowers blood sugar, mainly through promoting muscle and fat utilization of glucose, accelerating glycogen synthesis, inhibiting glycogenolysis, inhibiting gluconeogenesis in the liver and other ways to lower blood sugar. 2. Elevate blood glucose: including glucagon, glucocorticoids, adrenaline, etc., which mainly elevate blood glucose by promoting accelerated gluconeogenesis. Since insulin is the only hormone that can lower blood glucose, insulin deficiency and insulin resistance often lead to diabetes mellitus, therefore, when abnormal blood glucose occurs, you should go to a regular hospital in time and take appropriate measures under the guidance of a professional doctor.