What does a glucose tolerance test check?

The glucose tolerance test, officially known as the oral glucose tolerance test (OGTT), is an important medical examination used to evaluate an individual's ability to regulate blood sugar levels. This test primarily involves having the subject ingest a certain amount of glucose solution while in a fasting state, followed by timed measurements of blood glucose levels before and after consumption. This allows assessment of whether the pancreatic beta cell function and the body's ability to regulate blood sugar are normal, or whether there is a risk of glucose metabolism disorders such as diabetes. The glucose tolerance test is especially important for pregnant women, as it can promptly detect gestational diabetes and aid in monitoring and managing maternal and fetal health. At the same time, it is also one of the gold standards for diagnosing diabetes or impaired glucose tolerance in the general population, and plays a significant role in the prevention and control of diabetes and its complications.