Fasting blood sugar

Fasting Blood Sugar is a medical test that measures the level of glucose in the blood after a period of fasting. It is often used to diagnose or monitor diabetes and prediabetes.

Overview

The fasting blood sugar test, also known as the fasting plasma glucose test (FPG), is a simple blood test that measures the amount of glucose in the blood after an overnight fast. This test is commonly used to diagnose diabetes and prediabetes, conditions characterized by high blood sugar levels.

Procedure

The fasting blood sugar test is usually performed in the morning, after the patient has fasted for at least 8 hours. A small blood sample is taken from a vein in the arm and sent to a laboratory for analysis. The results are usually available within a few hours.

Interpretation of Results

The results of the fasting blood sugar test are usually given in milligrams per deciliter (mg/dL). According to the American Diabetes Association, a fasting blood sugar level less than 100 mg/dL is normal. A level from 100 to 125 mg/dL is considered prediabetes, and a level 126 mg/dL or higher on two separate tests indicates diabetes.

Risks and Considerations

The fasting blood sugar test is generally safe, with minimal risks. Some people may experience minor bruising or discomfort at the site where the blood is drawn. There is also a small risk of infection.

It's important to note that the fasting blood sugar test is not definitive. If the results are abnormal, additional testing is usually required to confirm a diagnosis of diabetes or prediabetes.

See Also

• Glucose tolerance test
• Hemoglobin A1C
• Diabetes
• Prediabetes

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