Quoting Lizplustwo:" The test is meant to see how well your body processes sugar...why would they make you fast, only to give you a glucose-packed soft drink?"
Quoting Lizplustwo:" But it can't. If you're producing insulin normally, then your blood sugar should never be above a certain ... [snip!] ... to process it. The more sugar you eat, the more insulin your pancreas produces. I never had to fast for either of mine."