The Glucose Tolerance Test is a diagnostic tool used to evaluate your body's response to sugar. This test helps your physician assess how efficiently your body regulates blood glucose levels.

The steps for performing a Glucose Tolerance Test are as follows:

1. You will be asked to fast overnight, typically for 8 to 12 hours, to ensure an accurate baseline measurement of your blood sugar levels.
2. Upon arrival at the laboratory, an initial blood sample will be drawn to measure your fasting blood glucose level.
3. You will then consume a glucose solution, which usually has a very sweet taste; this is a core component of the test.
4. Over the next few hours, blood samples will be drawn at regular intervals to track how your body processes the glucose.

This test helps evaluate your body's efficiency in handling sugar and is instrumental in diagnosing conditions related to glucose regulation, such as Diabetes Mellitus or Gestational Diabetes.