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Doctor insights on: Do You Have To Fast The Day Before A Hb A1c Test

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Do you have to fast the day before a hba1c test?

Do you have to fast the day before a hba1c test?

No: The hemoglobin A1c is a measure of the amount of hemoglobin that is bound to glucose (blood sugar) in red blood cells. Red blood cells live about 120 days, so the A1c gives an idea of diabetic control over 3 months. Eating on the day of the test will make no difference. Be sure, though, that no other tests, such as fasting lipid panel or fasting chemistries, have been ordered along w a1c. ...Read more

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Dr. Ira Katz
512 doctors shared insights

Hemoglobin A1c (Definition)

It helps determine the average blood sugar over a long period of time, about 2 or ...Read more


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Do I have to fast for a hba1c blood test?

Do I have to fast for a hba1c blood test?

Not really: The aic test generally tells us what has been going on with your sugar over the past 3 months approximately. One does not really have to fast for it, but it is best done fasting in my opinion, because your doctor will probably want to see a fasting blood sugar at the same time to help manage your diabetes. Often a lipid panel is done at the same time, which requires one to be fasting. ...Read more

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What is a hba1c test?

What is a hba1c test?

A measure: Of how much glucose attached to hemoglobin molecule. It reflects your avg. Blood sugar over 3 m. Normal up to 5.6 pre-diabetes 5.7-6.4 diabetes 6.5 and higher. ...Read more

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What is a normal hba1c test?

What is a normal hba1c test?

Under 6: Most laboratories will list the normal range of hba1c as 4-5.9. If you have diabetes your doctor will probably try to get your hba1c below 6.5 - but if it can go lower that is good. ...Read more

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After how much time hba1c test should repeat? My last result was 5.8 is this normal

Every 3 months.: Half life of Hgb is 120 days. You may use fructosamine levels very 2-3 weeks. Specially if BS is high and toy want to know if the initial treatment is satisfactory ...Read more

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What is a normalh hba1c test in a person that is not diabetic?

What is a normalh hba1c test in a person that is not diabetic?

HbA1c: It depends on lab normals. Mostly less than 6 percent. Now many define less than 5.7 percent as completely normal. ...Read more

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What does an hba1c test result of borderline low range (4.5) mean?

Good for you: The ranges are set to include most but not all healthy folks. I would not be at all concerned -- in fact, as a lab physician / pathologist, i'd urge you simply to ignore any lab that's not clearly out of kilter unless there's a specific reason for concern. ...Read more

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What does hba1c on a blood test mean?

What does hba1c on a blood test mean?

Average glucose: Hb A1c reflects the average blood glucose level over the previous 3-4 months. It is usually used to monitor glucose control in diabetes. It is also beginning to be used for diagnosis of diabetes. ...Read more

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HbA1C 5.4 (<5.5 normal). FBS 5.3 ( <6.0 normal) with last meal 14 hours before test. Family hx of diabetes. Is FBS too high? At risk range? Thnx.

HbA1C 5.4 (<5.5 normal). FBS 5.3 ( <6.0 normal) with last meal 14 hours before test. Family hx of diabetes. Is FBS too high? At risk range? Thnx.

Diabetes: Relax! There is no evidence, based on your numbers, that suggests you have diabetes. That said, with a family history of diabetes it would be wise to get advice from the family about the best foods and drinks for someone concerned about diabetes. ...Read more

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Is the hba1c the test for diabetics?

Is the hba1c the test for diabetics?

Yes: It is one of the test, it is used for diagnosis an also for follow up on how a person is doing with their medicine. ...Read more

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Does smoking marijuana show up on an hba1c test?

Does smoking marijuana show up on an hba1c test?

No, tests glucose: The hemoglobin A1c test is specifically looking for the percentage of hemoglobin with glucose attached to it. If you are smoking marijuana it will have no effect on the hga1c and only a test to specifically detect cannabis will show that chemical. ...Read more

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When hba1c blood test should be taken in fasting or after eating?

When hba1c blood test should be taken in fasting or after eating?

Does not matter: The a1c is a 2 month look-back at blood sugars. It does not matter whether or not you have eaten. ...Read more