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Doctor insights on: What Is The Difference Between Hb A1c And Serum Glucose

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What is the difference between hba1c and serum glucose?

What is the difference between hba1c and serum glucose?

A1c is average: The hemoglobin a1c is an average of your glucose over the prior 3 months or so. There are tables online that let you convert the % of glycosylated hemoglobin to what your avg glucose has been. ...Read more

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Blood Sugar (Definition)

The blood sugar concentration or blood glucose level is the amount of glucose (sugar) present in the blood of a human or animal. The body naturally tightly regulates blood glucose levels as a part of metabolic homeostasis. Glucose is the primary source of energy for the body's cells, and blood lipids (in the form of fats and oils) are primarily ...Read more


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Difference between A1c and serum glucose?

Difference between A1c and serum glucose?

Duration: An a1c is the average blood sugar over a 2-3 month period. A serum glucose is the blood sugar at the time the blood test is obtained. Both can be used to diagnosed diabetes (a1c and fasting glucose) although a1c is a more stable parameter. ...Read more

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How does serum glucose normally fluctuate during activie phases of acute or chronic pancreatitis? Does glucose get elevated AFTER pancreatitis ends?

How does serum glucose normally fluctuate during activie phases of acute or chronic pancreatitis? Does glucose get elevated AFTER pancreatitis ends?

Sugar: Your sugars can be very sporadic and and change upward or downward, with pancreatitis, but normally it will go up. As your pancreas is damaged, so are the cells that produce insulin and therefore your sugar my elevate. ...Read more

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What risk do I have with triglycerides 160, serum glucose 12 and ALT (sgpt) 54?

Needs clarification: Ideally your triglycerides would be less than 125 mg/dl and the alt, a liver enzyme, is slightly elevated which may be due to fatty liver associated with excess body weight and blood sugar. The confusing thing is your reported glucose: 12 is not compatible with life so i wonder if you mean hemoglobin a1c or glycosylated hemoglobin. If that is 12, you have uncontrolled diabetes &need urgent care. ...Read more

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Why are my serum glucose levels high?

Hard to say: Most often, this suggests one of the several types of diabetes. ...Read more

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I am Type 2 Diabetic. I have fasting insulin level of 12.3 and fasting serum glucose of 275. I eat between 50-100g carbs/day. What am I doing wrong?

I am Type 2 Diabetic. I have fasting insulin level of 12.3 and fasting serum glucose of 275.  I eat between 50-100g carbs/day.  What am I doing wrong?

Many options: Hi. I think it is more fruitful to ask, "What can be done differently to optimize control?" than "What am I doing wrong?". We don't know what diabetes drugs you're on, so I can't make any firm recommendations. Consider: healthy diet & regular exercise FOR LIFE. You're probably on metformin. I love the GLP-1 drugs (e.g., Victoza). SGLT-2 inhibitors are very nice too. Insulin's great when needed. ...Read more

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Blood serum glucose was 71 about an hour after eating. Is this too low? There have been issues with dizziness. What is an ideal threshold?

Blood serum glucose was 71 about an hour after eating. Is this too low? There have been issues with dizziness. What is an ideal threshold?

Fasting glucose: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, you should discuss the matter with your doctor to have a fasting blood glucose and if need be a glucose tolerance test. The information you provided is insufficient for a diagnosis. 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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Why is serum glucose more accurate than finger tip glucose, when monitoring readings? How much faith can I put with a home glucometer?

Why is serum glucose more accurate than finger tip glucose, when monitoring readings?  How much faith can I put with a home glucometer?

Plasma: has a higher water content than whole blood, so there is more dissolved glucose in plasma compared with whole blood, and readings are 15 to 20 percent higher. ...Read more

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Serum glucose is 2.2 doctor said borderline so need fasting blood test. What is this? and could this be related to B12 deficiency?

Serum glucose is 2.2 doctor said borderline so need fasting blood test. What is this? and could this be related to B12 deficiency?

Not related: Blood sugar and B-12 are not related, although a diabetes medicine called metformin can decrease your vitamin B-12 levels. Blood sugar that runs high can be a sign of Diabetes Mellitus or Pre-Diabetes. Get the fasting sugar test done and eat a healthy diet, low in simple sugars. ...Read more

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Is there a correlation between blood glucose and hba1c?

Is there a correlation between blood glucose and hba1c?

HbA1c: A hba1c test is a blood test that will show how well (or poorly) glucose control has been over the last few months. It measures a special type of hemoglobin that forms as a result of high glucose levels. A high hba1c means poor glucose control. ...Read more

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Could you have diabetes if your fasting glucose level and hba1c levers are normal?

Could you have diabetes if your fasting glucose level and hba1c levers are normal?

Unlikely: If both HbA1c and fasting glucose are normal you are most likely fine. Occasionally people are having much higher sugars AFTER they eat (measured 2 hours) and are diabetic without knowing it. This would have been reflected in the A1c though which is why I think you're probably fine! ...Read more

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My hba1c is 27mmol/mol , what is this converted to a blood glucose reading like on my meter in mmol eg 5.0 etc?

My hba1c is 27mmol/mol , what is this converted to a blood glucose reading like on my meter in mmol eg 5.0 etc?

Normal: A hba1c of 27 mmol/mol corresponds to 4.6% in the us. This is a normal level, and means that your average blood sugars are normal (4-5.6 mmol/l before meals). You cannot use hba1c to try to make a diagnosis of hypoglycemia or low sugars. ...Read more

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If my fasting glucose is sometimes over 7.0mmol and most days over 6.0mmol.Does that mean I am developing diabetes? Hba1c is 27mmol/mol

Daibetic?: In general, the reference range (that found in healthy persons), of hba 1c is about 20–40 mmol/mol (4–5.9%). At 27 mmol/molm, yours is normal. Do not worry about variations in blood glucose levels, worry about the hba1c level. Reduce any risk factors you may have such as obesity, exercise more and you may not develop diabetes in the future. Good luck. ...Read more

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My fasting blood glucose = 111 and hba1c = 5.3. Am i diabetic?

My fasting blood glucose = 111 and hba1c = 5.3. Am i diabetic?

Impaired fasting glu: If these values are consistent, this is called "impaired fasting glucose". It is not quite diabetes, but not quite normal either. People with this have a higher than average tendency to develop diabetes later. Consider it a warning sign to improve diet, weight and physical activity. ...Read more

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Dads HbA1C was 6.2 & FBS 90 at 21/1/2015,he made diabetic diet: HbA1C was 6.0 & FBS 84 & glucose 2hrs post prondial 63 at 4/4/2015,.IS DAD diabetic?

Dads HbA1C was 6.2 & FBS 90 at 21/1/2015,he made diabetic diet: HbA1C was 6.0 & FBS 84 & glucose 2hrs post prondial 63 at 4/4/2015,.IS DAD diabetic?

A1c: If Dad is not taking any insulin he is doing just fine. On the assumption that he is not taking and medicine for diabetes he is OK. If he is on medication for diabetes he should slow down his meds by 50%. PS: If anything, Dad is not a "diabetic". That is a silly term. In type 2 diabetes the theme is "I have diabetes" and the end result is "I am going to beat it!" ...Read more

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Dads HbA1C was 6.2 & FBS 90 at 21/1/2015, HbA1C was 6.0 & FBS 84 & glucose 2hrs post prondial 63 at 4/4/2015,psa total 0.5 at6/4/2015.IS DAD diabetic?

No: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, the lab results do not indicate diabetes. He is likely not even pre-diabetic. ...Read more

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A year ago my hba1c was 32mmol/mol, now it is 27mmol/mol.What does this indicate concerning my glucose regulation?Good or bad?

No diabetes: Your hgba1c is well below what is considered a diabetic. If you have diabetes and are on meds, then you are very well controlled and in fact i would worry about being over treated. If you don't have diabetes, this test only says you're not diabetic, nothing more. ...Read more

Dr. Cayce Jehaimi
2,588 doctors shared insights

Glucose (Definition)

Glucose is the basic sugar molecule and the source of energy throughout the living kingdom. We are programmed to easily detect it by taste in our foods as it is desirable but can be overdone with the modern diet. It gets out of control ...Read more


Serum (Definition)

Serum is the component of blood that does not contain cells or clotting factors. It does contain electrolytes an ...Read more