Glucose tolerance test

Glucose tolerance test is a medical test that checks how the body metabolizes glucose. It is often used to diagnose diabetes and prediabetes.

Procedure

The glucose tolerance test is performed in several steps. First, the patient fasts overnight. Then, the patient's blood is drawn to measure the fasting blood glucose level. Next, the patient drinks a solution containing a certain amount of glucose. Blood is drawn again after two hours to measure the blood glucose level.

Interpretation

The results of the glucose tolerance test are interpreted based on the blood glucose levels at fasting and two hours after drinking the glucose solution. If the fasting blood glucose level is above 126 mg/dL or the two-hour blood glucose level is above 200 mg/dL, the patient is diagnosed with diabetes. If the fasting blood glucose level is between 100 and 125 mg/dL or the two-hour blood glucose level is between 140 and 199 mg/dL, the patient is diagnosed with prediabetes.

Risks

The glucose tolerance test is generally safe. However, it can cause side effects such as nausea, vomiting, and bloating. In rare cases, it can cause a serious condition called hyperglycemia, which is a high blood glucose level.

See also

• Diabetes
• Prediabetes
• Hyperglycemia

Glucose tolerance test Resources
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