Blood sugar levels after eating can vary by age, but a reading below 140 milligrams per deciliter (mg/dL) is generally considered normal ... of the three-hour test are especially useful in diagnosing ...

This is a simple, routine test. First, you’ll drink a sugary liquid provided by us and we’ll ask that you do not eat or drink anything else (including chewing gum) for an hour. Then, we’ll draw your ...