Does It - Lab technician or nurse.
Glucose solution can be unpalatably sweet.
When - Within 1 day. Most commonly used to diagnose gestational diabetes. Also used to diagnose diabetes in people who exhibit symptoms but have high-normal results on blood glucose test. How it works - The pancreas releases insulin into the bloodstream to regulate the body's processing of glucose. By measuring the amount of glucose in the blood after a concentrated amount of glucose is ingested, it is possible to assess how well insulin is functioning.