In the past I'd had several
GTT 's (when I was pre-diabetic) and all were always normal. The first two involved the drink. The last one, my doc ordered a fasting glucose, then I had to go eat a real high carb meal (pancakes, syrup, orange juice, etc) and then return in so-many-minutes for the follow-up-testing. And that result was normal too. I was surprised when I was dx 'd a few months...