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Doctor insights on: Do I Have To Fast For A Hb A1c Blood Test

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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

Dr. Ira Katz
518 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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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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My sugar blood test =101 after 12 h fasting and the hba1c =5.3, I am so much worry about this, should I be? Labs says that normal range is 75-115?

My sugar blood test =101 after 12 h fasting and the hba1c =5.3, I am so much worry about this, should I be? Labs says that normal range is 75-115?

Not to worry...: These values are within the expected range, so I see no need to worry about them. If you are concerned about possibly having diabetes, due to family history, then I would suggest you see your primary care physician to discuss these concerns. ...Read more

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Need help docs! My blood test showed a hba1c level of 6 (the maximum range level is 5.7). How concerned should I be and what dietary changes should I make?

Need help docs! My blood test showed a hba1c level of 6 (the maximum range level is 5.7). How concerned should I be and what dietary changes should I make?

6 is still good: A Hba1c of 6 is still good. You should be mildly concerned but determined to make significant lifestyle changes to lose weight, increase exercise. Now is the best time to do this, before the effects of diabetes set in making it harder to lose weight. Right now your body is just a 'little' off and resetting it will be easier than when it is 'way' off! ...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

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What can I do to lower my HbA1C and glucose levels? My last blood test over a year ago shower HbA1C 5.6 and glucose 83.... I still eat lots of sugar!!

What can I do to lower my HbA1C and glucose levels? My last blood test over a year ago shower HbA1C 5.6 and glucose 83.... I still eat lots of sugar!!

What's the concern?: Eating sugar isn't really a factor when blood glucose is being evaluated. Maybe you can get your carbs in some other more wholesome form. Both your HgbA1c and glucose are fine. At age 24, you've got lots more worth your attention than fretting over labs. The key to preventing diabetes long-run -- and a huge help to one's emotions in a cruel world -- is staying aerobically fit. Best wishes. ...Read more

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I had a blood test done&my doctor check my hba1c levels even though I'm not diabetic, results came back clear but im still getting diabetic symptoms?!

I had a blood test done&my doctor check my hba1c levels even though I'm not diabetic, results came back clear but im still getting diabetic symptoms?!

Find another cause: Make a conscious decision to stop the obsessive idea that you have diabetes. If your personal physician cannot find the cause of your symptoms, get a consult. If you want to tell us what symptoms / signs you're having, I bet the healthtap team can suggest a few ideas -- including some that are often missed. ...Read more

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My father is 55 year old. His blood test result of hba1c is 7.6%. And urine microalbumin level 85 mg/l. Is it normal? ? If not so how to control it.

High HbA1c: Your father has two problems. One is poorly controlled diabetes and the other is proteinuria. (p). P has ominous implications. Patients with significant p have an increased incidence of renal failure, stroke and cardiac disease. Have a nephrologist collect his urine to see how much protein is in it/day. He will need to be on ace-i or arb's to lower it. Have his glucose controlled so his hb1ac. ...Read more

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finished a 9 day taper of prednisone and now I get a call saying doctor wants me to come in for Hba1c blood test with no explanation why?

finished a 9 day taper of prednisone and now I get a call saying doctor wants me to come in for Hba1c blood test with no explanation why?

Sugar: You likely have an elevated blood sugar on some previous blood testing done and your doctor wants to check to make sure you do not have diabetes ...Read more

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I am of SE Asian Origin Blood Test for Sweats at night and Tiredness result states the patient has variant Hb prevents accurate measure of HbA1c Recommend serum Fructosmine level to Mon Diabetes control. WBC 3.9 Range 4-11 Neutrophilis 1.3 R 2.0-7.5?

Variant hb: Abnormal hemoglobins can be a problem with diabetes management, as the Hgb A1C is not accurate. You can try following the fructosamine (or glycated albumin), but it is not a very good test, and is often not helpful. Better to follow fingerstick glu more carefully. ...Read more

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Can eating before a hemoglobin A1c blood test make the levels higher than they really are?

Can eating before a hemoglobin A1c blood test make the levels higher than they really are?

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 more

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Blood test showed low hemoglobin A1c (4.4%) Everything else was normal. What could cause this?

Nothing bad: Actually the low level does not mean much higher level could indicate that you average blood suger could be higher than normal and it depend how high it is
lower level could indicate normal or slightly lower blood sugar and most of the time it is normal
the test is design to check average blood sugar for the last 1-2 weeks and the sensitivity and the accuracy of the test is higher in high BS ...Read more

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How do I read my blood test thyroid panel, hemoglobin a1c, beta chorionic gonadotrop (hcg), ?

How do I read my blood test thyroid panel, hemoglobin a1c, beta chorionic gonadotrop (hcg), ?

Discuss with your MD: You need to discuss with your doctor who ordered those blood work-in regard to the blood work result. ...Read more

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In my recent blood test my glucose was 204. C-peptide was 0.37 and glutamic acid decarboxylase was >30.0. Also my hemoglobin A1c was 10.1?

In my recent blood test my glucose was 204. C-peptide was 0.37 and glutamic acid decarboxylase was >30.0. Also my hemoglobin A1c was 10.1?

Type I diabetes.: With a hemoglobin A1C so high and I assume a high fasting glucose, unfortunately, it appears that you are diabetic. A high glutamic decarboxylase can mean anti-islet cell of the pancreas antibodies, but can also be elevated in other autoimmune conditions. A lower C-peptide and positive antibodies indicate Type I diabetes.
If you are not on insulin yet, please seek help ASAP in the ER. ...Read more

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Fasting glucose=91 & 89 on 2 diff blood test, 2nd time tested insulin 3 hemoglobin A1c 5.4 I am constantly craving sugar, often become shaky & lightheaded, I'm 123 lbs 5'9" am I at risk for diabetes?

Fasting glucose=91 & 89 on 2 diff blood test, 2nd time tested insulin 3 hemoglobin A1c 5.4 I am constantly craving sugar, often become shaky & lightheaded, I'm 123 lbs 5'9" am I at risk for diabetes?

Adrenals: Shaking is low sugar your sugar runs slightly above 100 per hba1c 5.0 =100. So you need to bring down stress via supporting adrenals which can be helped via 5 factors - magnesium, b vitamins, water 1/2 of body weight in oz per day, sleep at least 6-8 hours at night, adaptogen like herbs like adhs (vasopressin) from biotics. Take adhs (vasopressin) 2 pills in morning recheck hba1c in 1 month to show progress. ...Read more

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Do I have to fast before I take a vitamin level blood test?

Do I have to fast before I take a vitamin level blood test?

No! Fasting of? Value: Fasting for most issues not only of low value but often misleading. Ex.: people commonly told to fast before blood glucose test; yet Diabetes Mellitus=elevated blood glucose & glucose most commonly elevated after eating. Thus fasting glucose routinely misses Diabetes Mellitus. Fasting is promoted for only a few issues because how databases were done or because the values are calculated/estimated. ...Read more

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How come I have to fast before getting a blood test?

See below: Fasting blood sugars and triglyceride levels are what are used to compare to known normal values. Eating will raise them. ...Read more

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Do I have to fast for thyroid blood test? It read that I don't have to. The never told me that I had to either.

Do I have to fast for thyroid blood test? It read that I don't have to. The never told me that I had to either.

No: You do not need to fast for thyroid function tests. However, if your doctor ordered other tests, e.g. blood lipids, or blood glucose, fasting is required.
For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex.
Get HPV vaccine. ...Read more

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What to do if I have an appointment for a blood test at noon tomorrow and What to do if I have to fast for 12 hours and I was wondering?

What to do if I have an appointment for a blood test at noon tomorrow and What to do if I have to fast for 12 hours and I was wondering?

Depends: There are many different types of blood test and only some require that you fast. You should of received information regarding this when the test was scheduled. If you have any questions, feel free to call the clinic or laboratory directly and ask them if you need to do anything prior to the test. It's better that you be informed and prepared before going. ...Read more

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Should I fast for a TSH blood test?

No: Fasting for TSH is not necessary and will not change results. ...Read more

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Can you fast too long before a fasting blood test?

In a way, yes: If you fast for longer than a day or so, it will alter some blood chemistries. Fasting tests are usually set for an overnight fast, or a 12 hour fast. Prolonged fasting is starvation and it affects the body metabolism. ...Read more

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How long do docs recommend I should I fast before a blood test?

You might not need t: To fast. Usually this is for certain things like your glucose level. For many tests fasting is unecessary. So ask your doctor or health professional before you have your blood drawn. ...Read more