Glycated hemoglobin, how long it takes to reduce from 10% to 5% is not yet clear data. It depends on the degree of increase in glycosylated hemoglobin, the effect of treatment, and the patient’s own condition. Glycated hemoglobin level can be used as a diagnostic test for diabetes, reflecting the patient’s average blood glucose level in the last 8-12 weeks. Glycated hemoglobin of 10%, combined with symptoms and other tests, can confirm the diagnosis of diabetes. The normal level of glycosylated hemoglobin is usually 4% to 6%, and there is no clear data on how long it takes to drop from 10% to 5%. The exact time can be affected by the degree of increase in glycosylated hemoglobin, the effect of treatment, the patient’s own condition and other factors. Patients should actively follow the doctor’s instructions to use hypoglycemic drugs for treatment, pay attention to the diet structure and increase exercise in daily life to control blood glucose. Glycated hemoglobin will usually be rechecked 3 months after treatment to observe the extent of decrease.