At a Glance
Why Get Tested?
To help evaluate your ability to absorb carbohydrates
When to Get Tested?
Timed blood samples drawn from a vein in your arm and a timed urine collection
Test Preparation Needed?
Fast for 8 hours and avoid foods high in pentose, such as jams, fruits, and pastries, for 24 hours prior to the test. Ask your doctor if there are any changes to your medications that you should make.