Is 139 a high sugar reading?

A blood sugar reading of 139 is considered high for a person who is not diabetic. The normal range for blood sugar levels is between 70 and 110 mg/dL (milligrams per deciliter). A reading of 139 mg/dL is considered prediabetic, which means that the person is at risk for developing diabetes.

If your blood sugar level is 139 mg/dL, you should talk to your doctor about ways to lower your risk of developing diabetes. This may include changes to your diet and lifestyle, such as losing weight, eating a healthy diet, and getting regular exercise.