Glucose Tolerance Test - GCSE Biology Definition

A Glucose Tolerance Test is a medical test used to check how well your body processes sugar. It helps doctors find out if a person has diabetes or other problems with how the body handles sugar. During the test, a person is usually asked to fast overnight and then drink a sugary liquid at the clinic. After drinking it, doctors take a series of blood samples over a few hours to see how quickly the sugar is cleared from the blood. If the sugar levels stay too high, it might mean the person has diabetes or a condition called insulin resistance. This test helps understand how the body manages glucose, which is important for maintaining energy and health.