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The hemoglobin A1c, or glycohemoglobin, is a measure of how much sugar is attached to the hemoglobin protein in the blood. Sine hemoglobin is removed from the blood along with the red cell in which it is resides measuring the a1c can give an estimate of ow high the sugar has been averaging over the life of the red cell, which is usually about 120 days (4 months).

The most recent time frame has a larger effect on it than more distant times so it is often, somewhat inaccurately, said to give a 3 month average. It can be affected by anemia, blood loss, blood transfusions and abnormal hemoglobins.

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11y ago

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