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Hemoglobin A1c Chart
Average blood sugar: Hemoglobin A1c is a measure of the percentage of red blood cells permanently bound to glucose. Normally about 5% of our red cells are glycosolated. If you have greater than 6.5% you are diabetic. It is not affected by fasting, and since our rbc's live 90-120 days, it reflects an average over that time. ...Read moreSee 2 more doctor answers
Hemoglobin A1C: This is a rough estimate of average blood sugar control over a three month period, more accurate than a single fasting blood glucose (sugar) level. In many tests, greater than 5.9 is considered abnormal, but you should discuss risk factors and prevention of diabetes with your doctor. ...Read moreSee 1 more doctor answer
Short answer: The test measures indirectly measures glucose control over the preceding 6-8 weeks. It does not measure sugar directly; therefore i would believe it not to be necessary to fast prior to the test. However, the best way to answer this question is to call the lab where you go to have the blood drawn and ask them directly whether you need to fast for the test. ...Read more
Poor sugar control: Hemoglobin A1c measures average blood sugar over approximately the past 3 months. It is the measure of how much hemoglobin is attached to sugar molecules in the blood. Sugar in your blood binds to the hemoglobin of the red blood cell and stays there throughout the cell's lifetime (120 days). At high levels of blood sugar, more reacts w/ the hemoglobin, causing an elevated hemoglobin a1c. ...Read moreSee 1 more doctor answer
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