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do you have to fast for hemoglobin a1c test

A 25-year-old member asked:
Dr. Timothy Ashley
14 years experience Internal Medicine and Pediatrics
No: For hba1c alone, no fasting is required, but it is often done with other tests, like cholesterol or blood sugar, for which fasting is indicated.
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Dr. Andrew Turrisi
46 years experience Radiation Oncology
Hgb-a-1-c: Is used to monitor diabetic treatment. I get mine 3 -4 times per year.You do not have to fast for it, because it shows how well your blood levels have ... Read More

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A 36-year-old member asked:
Dr. Michael Fox
33 years experience Fertility Medicine
You don't: No fasting necessary.
Dr. Andrew Turrisi
46 years experience Radiation Oncology
Hgb A-1-c: Does not require fasting. It reflects blood sugar control over time. The fast is usually for the blood sugar or lipid profiles drawn at the same tim ... Read More
A 38-year-old member asked:
Dr. Herbert Duvivier
32 years experience Hematology and Oncology
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 n ... Read More
A 33-year-old member asked:
Dr. Brittany Chan
9 years experience Pediatrics
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 molecu ... Read More
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A 41-year-old member asked:
Dr. Carol Cheney
44 years experience Endocrinology
4 to 6: The normal range varies from lab to lab but is generally between about 4 and 6 percent.
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A 44-year-old member asked:
Dr. Thomas Knecht
A Verified Doctor answered
A US doctor answered Learn more
Low normal: Hi. That A1c is low in the normal range, and miles from diabetes. IF you have diabetes and have so much as ONE hypoglycemic episode (BG
A 29-year-old male asked:
Dr. Stuart Hickerson
31 years experience Family Medicine
Elevated blood sugar: The A1C determines your blood sugar level for past 3 months. On the lab I am familiar with above 6 is abnormal.
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A 50-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Pre-diabetes: Not good. It represents being prone to diabetes. You have time to reverse this process with lifestyle changes.
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A 33-year-old member asked:
Dr. Timothy Ashley
14 years experience Internal Medicine and Pediatrics
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 sustaine ... Read More
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A 34-year-old member asked:
Dr. Quang Nguyen
Specializes in Endocrinology
Yes: As of 2010, we can use A1c to diagnose diabetes or pre-diabetes. 2 positive tests are still needed but A1c of 5.7-6.4% is considered pre-diabetes, A ... Read More
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