what is required in a blood glucose test
The blood glucose test may be used to: 1  Detect high blood glucose (hyperglycemia) and low blood glucose (hypoglycemia). 2  Screen for diabetes in people who are at risk before signs and symptoms are apparent; in some cases, there may be no early signs or symptoms of diabetes. Fasting glucose (fasting blood glucose, FBG) â this test measures the level of glucose in the blood after fasting for at least 8 hours. 2  2-hour glucose tolerance test (GTT) â for this test, the person has a fasting glucose test done (see above), then drinks a 75-gram glucose drink.