ORAL GLUCOSE TOLERANCE TEST (OGTT)

The Glucose Tolerance Test (GTT) is a diagnostic test used to assess how your body processes glucose, the main type of sugar in your blood. It is commonly used to diagnose diabetes, prediabetes, and gestational diabetes (a type of diabetes that develops during pregnancy).How the Glucose Tolerance Test Works:Preparation: Before the test, you will typically be asked to fast (not eat or drink anything except water) for about 8-12 hours.Initial Blood Sample: A healthcare provider will take an initial blood sample to measure your fasting blood glucose level.Glucose Drink: You will be given a glucose solution to drink. The amount of glucose in the solution can vary, but it is usually 75 grams for adults (50 grams for children and a different amount for pregnant women during the gestational diabetes test).Blood Samples Over Time: After drinking the solution, blood samples are taken at regular intervals (usually at 30 minutes, 1 hour, 2 hours, and sometimes 3 hours) to measure how your blood glucose levels change over time.Uses of GTT:Diagnosing Type 2 Diabetes: Helps identify people who have diabetes or are at risk.Gestational Diabetes: Typically performed between 24-28 weeks of pregnancy.Assessing Impaired Glucose Tolerance: Identifies prediabetes, which is a risk factor for future diabetes.