The efficacy and function of jiuyuanguiyi tea is to regulate blood sugar, and hawthorn and poria cocos in jiuyuanguiyi tea have the function of regulating blood sugar. It can improve insulin sensitivity, reduce blood sugar fluctuation, and prevent and improve diabetes. Nine yuan a tea helps to lower blood sugar, but the effect varies from person to person. If the blood sugar is too high, you still need to follow the doctor's advice and take hypoglycemic drugs on time.