When to Test for Diabetes Mellitus?

Your doctor may recommend blood sugar testing four to 10 times a day if you have type 1 diabetes. You may need to test: Before meals and snacks. Before and after exercise.

When should you get tested for diabetes?

According to the American Diabetes Association, all patients should be screened for diabetes at three-year intervals beginning at age 45, especially people who are overweight or obese. If multiple risk factors are present, screening should be done at an earlier age and more frequently.

At what blood glucose level can diabetes mellitus be diagnosed?

Fasting blood sugar test.

A fasting blood sugar level from 100 to 125 mg/dL (5.6 to 6.9 mmol/L) is considered prediabetes. If it's 126 mg/dL (7 mmol/L) or higher on two separate tests, you have diabetes.