Doctor insights on:
Do You Have To Fast For Hemoglobin A1c Test
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
4 to 6: The normal range varies from lab to lab but is generally between about 4 and 6 percent. ...Read more
Good: Guidelines are frequently revised in the diagnosis of prediabetes. The current guidelines consider Hgb a1c values of 5.7 or less to be normal. For practical purposes, a value of 5.8 is good. If there is family history of diabetes, it should be retested every six months ...Read moreSee 1 more doctor answer
No: Hemoglobin A1c is a test used to measure the sugar content in your blood that has occurred over the last few months. By eating before a blood sugar test (usually done by finger prick) you can elevate the sugar levels in your blood, but this won't immediately change your hba1c. Hba1c comes from a build-up of "glycated hemoglobin" in the red blood cells over their life cycles, about 120 days. ...Read moreSee 1 more doctor answer
Poor: Hba1c is fair at detecting chronically high bgs, but very poor at detecting low bgs. Fortunately, true low bgs are very rare and almost never sustained or recurrent. The sensation of "hypoglycemia", when related to sugar at all in people not treated with diabetes medications, is usually the normal response to low-ish sugars, which corrects them and keeps the body well. ...Read moreSee 1 more doctor answer
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