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What tests are used to diagnose diabetes?

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Getting diagnosed with diabetes begins with one of three tests. In most cases, your doctor will want to repeat a test to confirm your diagnosis:

  • A fasting glucose test is a test of your blood sugar levels taken in the morning before you have eaten. A level of 126 mg/dL or higher may mean that you have diabetes.
  • An oral glucose tolerance test (OGTT) entails drinking a beverage containing glucose and then having your blood glucose levels checked every 30 to 60 minutes for up to 3 hours. If the glucose level is 200 mg/dL or higher at 2 hours, then you might have diabetes.
  • The A1C test is a simple blood test that shows your average blood sugar levels for the past 2-3 months. An A1C level of 6.5% or higher may mean you have diabetes. Your doctor may also suggest a zinc transporter 8 autoantibody (ZnT8Ab) test. This blood test -- along with other information and test results -- can help determine if a person has type 1 diabetes instead of another type. The goal of having the ZnT8Ab test is a prompt and accurate diagnosis and that can lead to timely treatment.

SOURCES: 

News release, FDA. 

American Family Physician. 

National Diabetes Education Program. 

American Diabetes Association. 

Clinical Diabetes Journal. 

WebMD Health News: "FDA Restricts Use of Diabetes Drug Avandia." 

News release, FDA: '' Actos (pioglitazone): Ongoing Safety Review - Potential Increased Risk of Bladder Cancer."

News release, FDA.

Reviewed by Jennifer Robinson on January 12, 2018

SOURCES: 

News release, FDA. 

American Family Physician. 

National Diabetes Education Program. 

American Diabetes Association. 

Clinical Diabetes Journal. 

WebMD Health News: "FDA Restricts Use of Diabetes Drug Avandia." 

News release, FDA: '' Actos (pioglitazone): Ongoing Safety Review - Potential Increased Risk of Bladder Cancer."

News release, FDA.

Reviewed by Jennifer Robinson on January 12, 2018

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What are the types of injectable insulin for diabetes?

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