3 Hour Glucose Tolerance Test
The three-hour test requires you to be fasting for eight hours prior to having your blood drawn in the lab. The lab will then give you the Glucose to drink and will draw your blood at one, two, and three hours later.
If the three-hour testing also proves to be abnormal, you will be instructed to obtain dietary counseling and follow the appropriate American Diabetic Association diet. You will also be referred to an endocrinologist who specializes in diabetes and will determine if you can be diet controlled or will need to be placed on insulin.