How is a hemoglobin A1C test performed?

Emilia Klapp
Nutrition & Dietetics
The hemoglobin A1c test involves taking a single drop of blood, which is either analyzed at a laboratory or at a doctors’ office. You don’t need to worry about fasting; food eaten on the same day won’t affect the result. People with diabetes usually undergo this test every three months. If their blood-sugar level is under control, twice a year may be enough.

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Diabetes

Diabetes mellitus (MEL-ih-tus), often referred to as diabetes, is characterized by high blood glucose (sugar) levels that result from the body’s inability to produce enough insulin and/or effectively utilize the insulin. Diabetes ...

is a serious, life-long condition and the sixth leading cause of death in the United States. Diabetes is a disorder of metabolism (the body's way of digesting food and converting it into energy). There are three forms of diabetes. Type 1 diabetes is an autoimmune disease that accounts for five- to 10-percent of all diagnosed cases of diabetes. Type 2 diabetes may account for 90- to 95-percent of all diagnosed cases. The third type of diabetes occurs in pregnancy and is referred to as gestational diabetes. Left untreated, gestational diabetes can cause health issues for pregnant women and their babies. People with diabetes can take preventive steps to control this disease and decrease the risk of further complications.
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