Dried guava in water does not lower blood glucose, and excessive consumption may also raise blood glucose. Some studies have shown that the active ingredients extracted from guava can improve the blood glucose value of mice, suggesting that it may have a certain hypoglycemic effect, but there is no study that can clearly show that dried guava water can play a role in lowering blood sugar. Patients who need to lower blood sugar should use insulin or take metformin, acarbose and other hypoglycemic drugs under the guidance of a doctor, along with appropriate physical exercise and dietary control, to control blood sugar within a reasonable range. Patients diagnosed with diabetes should be treated under the guidance of a doctor, only by drinking dried guava infused water can not lower blood sugar, please take a scientific approach to lowering sugar.