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Diabetes Health Center

Diagnosis & Tests

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Diabetes is a disorder of metabolism -- the way our bodies use digested food for growth and energy. There are three main types of diabetes: type 1, type 2, and gestational diabetes.

Diagnosing Diabetes

Diabetes and prediabetes are diagnosed with a fasting plasma glucose test, oral glucose tolerance test, or random plasma glucose test.

Diabetes Tests & Screening

A blood glucose test measures the amount of a type of sugar, called glucose, in your blood. Glucose comes from carbohydrate foods. It is the main source of energy used by the body.

The hemoglobin A1c test, also called HbA1c, glycated hemoglobin test, or glycohemoglobin, is an important blood  test that shows how well your diabetes is being controlled.

Two simple tests that check your urine can help you and your doctor watch for kidney disease and severe high blood sugar.

Although doctors don't routinely use it anymore, the oral glucose tolerance test is the gold standard for diagnosing type 2 diabetes. It's still commonly used to diagnose gestational diabetes, a condition that a woman can get while pregnant.

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