why is my fasting blood sugar higher than my a1c
Although studies show low vitamin D is linked to poor diabetes control, it wouldn't necessarily give you a false reading. A hemoglobin A1C higher than 6.5% indicates diabetes. The fact that your fasting blood glucose was normal, is probably why your doctor is having you re-take your hemoglobin A1C.Hopefully the second test will give you some clarity.lthough studies show low vitamin D is linked to poor diabetes control, it wouldn't necessarily give you a false reading. A hemoglobin A1C higher than 6.5% indicates diabetes. The fact that your fasting blood glucose was normal, is probably why your doctor is having you re-take your hemoglobin A1C.