A glycated hemoglobin of 6.8% may be serious, as the normal range for glycated hemoglobin is 4% to 6%. Glycated hemoglobin refers to the substance produced by combining hemoglobin and glucose in red blood cells. Glycated hemoglobin reflects the average level of blood glucose over the last 2-3 months. A level greater than 6.5% is considered likely to be diabetic, and regular monitoring of glycated hemoglobin can help to monitor the condition of diabetes. Glycated hemoglobin of 6.8% may be more serious, considering that it may be diabetes mellitus, it is recommended to improve blood glucose monitoring, diagnosis and treatment under the guidance of a doctor. If diabetes has been diagnosed, individualized glycated hemoglobin goals should be set under medical supervision.