A glucose tolerance test (GTT) checks how well the body processes blood sugar (glucose). It involves comparing the levels of glucose in the blood before and after drinking a sugary drink. The results of this test can help doctors to detect type 2 diabetes or pre-diabetes (impaired glucose tolerance). It is also used in diagnosing diabetes in pregnancy.
This is a companion discussion topic for the original article at https://patient.info/diabetes/pre-diabetes-impaired-glucose-tolerance/glucose-tolerance-test