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Testing for Diabetes is Simple

Updated: Apr 28

Testing for diabetes is simple, and results are usually available rather quickly. It is vitally important to get your blood sugar tested to find out for sure if you have prediabetes, type 1, type 2, or gestational diabetes to live the best quality of life possible.



If you are showing diabetic symptoms, your doctor will have you take one or more of the following blood tests to confirm the diagnosis:

  • The A1C test measures your average blood sugar level over the past two or three months. An A1C below 5.7% is normal, between 5.7 and 6.4% indicates you have prediabetes, and 6.5% or higher indicates you have diabetes.

  • The Fasting Blood Sugar Test measures your blood sugar after an overnight fast. As a fasting blood sugar level of 99 mg/dL or lower is normal, 100 to 125 mg/dL indicates you have prediabetes, and 126 mg/dL or higher indicates you have diabetes.

  • The Glucose Tolerance Test measures your blood sugar before and after you drink a liquid that contains glucose. You will fast overnight before the test and have your blood drawn to determine your fasting blood sugar level. Then you’ll drink the liquid and have your blood sugar level checked 1 hour, 2 hours, and possibly 3 hours afterward. At 2 hours, a blood sugar level of 140 mg/dL or lower is considered normal, 140 to 199 mg/dL indicates you have prediabetes, and 200 mg/dL or higher indicates you have diabetes.

  • The Random Blood Sugar Test measures your blood sugar at the time you’re tested. You can take this test at any time and don’t need to fast (not eat) first. A blood sugar level of 200 mg/dL or higher indicates you have diabetes.

  • Test for Gestational diabetes is diagnosed using blood tests. You’ll probably be tested between 24 and 28 weeks of pregnancy. If your risk is higher for getting gestational diabetes (due to having more risk factors), your doctor may test you earlier. Blood sugar that’s higher than normal early in your pregnancy may indicate you have type 1 or type 2 diabetes rather than gestational diabetes.

  • The Glucose Screening Test measures your blood sugar at the time you’re tested. You’ll drink a liquid that contains glucose, and then 1 hour later your blood will be drawn to check your blood sugar level. A normal result is 140 mg/dL or lower. If your level is higher than 140 mg/dL, you’ll need to take a glucose tolerance test.

  • The Glucose Tolerance Test measures your blood sugar before and after you drink a liquid that contains glucose. You will not eat overnight before the test and have your blood drawn to determine your fasting blood sugar level. Then you’ll drink the liquid and have your blood sugar level checked 1 hour, 2 hours, and possibly 3 hours afterward. Results can differ depending on the size of the glucose drink and how often your blood sugar is tested. Ask your doctor what your test results mean.

If your test results show you have type 1, type 2, or gestational diabetes, talk with your doctor or nurse about a detailed treatment plan. This includes diabetes self-management education and support services, and specific steps you can take to be your healthiest.

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