Everyone who's had diabetes for a while is aware that there's some sort of relationship between their blood glucose (BG) levels and the results of their hemoglobin A1c (A1C) test. If someone's BGs are completely normal for the last three months, it's probably safe to assume that the A1C, if measured today, would be normal. But the reverse is not true: a normal A1C doesn't mean all the BGs the past three months have been normal: that might have been the case, but it's also possible, and indeed...