I just got the call that I failed my 1h glucose tolerance test and will need to go in next week for a 3h test. I understand this and also understand many women fail the 1h & pass the 3h.

However, my doctors office makes you eat a HIGH carb diet for the three days before the 3 hour. This makes no sense to me. High carb means higher sugar. Why would I do this? Anyone else have to follow a certain diet before their test and not just drink the 100g sugar drink?