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Doctor insights on: Fasting Time For Blood Sugar Test

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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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Are random blood sugar test for glucose accurate for diagnosing diabetes?

Are random blood sugar test for glucose accurate for diagnosing diabetes?

Not ideal: There are multiple tests for diabetes but preferred are fasting glucose and hemoglobin A1c levels. Generally, these are tested on two separate occasions to confirm the diagnosis unless the numbers are way out of range. Non-fasting glucose with symptoms suggestive of diabetes can be reliable. Take care. ...Read more

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Which test is more reliable for monitoring diabetes: a blood sugar test or urine sugar test?

Which test is more reliable for monitoring diabetes: a blood sugar test or urine sugar test?

Bllod sugar: Glucose appears in urine only when blood sugar is greater than (debate) 180-220. Would like to aim for sugars 80-150 for good control. So can still be in 150-180 range, chronically, and still be in less than ideal control without any sugar appearing in urine. ...Read more

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Is a random glucose blood sugar test accurate to diagnose diabetes?

Is a random glucose blood sugar test accurate to diagnose diabetes?

Random glucose >200: The ADA has set criteria for the diagnosis of diabetes as a patient with classic symptoms of hyperglycemia and a random glucose blood glucose > 200mg/dL http://www.diabetes.org/diabetes-basics/diagnosis/ ...Read more

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Is smoking during fasting hours before fasting blood test increases the blood sugar in the test?

Is smoking during fasting hours before fasting blood test increases the blood sugar in the test?

It shouldn't: Smoking a cigarette before a blood test should not increase your sugar level. Thus, i would discuss with your doctor why your sugar was elevated as this may be the first sign of diabetes. Good luck! ...Read more

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How many hours to fast before a fasting blood sugar level test?

How many hours to fast before a fasting blood sugar level test?

Fasting: Depends on what's being measured but nothing after midnight for 8 am lab draw is adequate. Make sure you drink plenty of water. ...Read more

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Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Recently bloodwork for fasting insulin. How is this different that a glucose tolerance test or a fasting glucose test?

Different tests: Insulin & glucose are 2 different ways to measure diabetes. Insulin is produced by pancreas to keep sugars under control. We measure glucose to see how well sugars are controlled. Think of glucose as speedometer & Insulin as tachometer (hgba1c is avg trip speed - ask a car nut if this doesn't make sense). Glucose tolerance test requires drinking sugar whereas other 2 tests don't. ...Read more

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Random blood sugar test result 375mg/dL repeat test done Fasting Plasma Glucose result 228mg/dL. Am I diabetic?

Random blood sugar test result 375mg/dL repeat test done Fasting Plasma Glucose result 228mg/dL. Am I diabetic?

Yes!: You are def a diabetic. Get a glucose meter and check some fingersticks. Completely NL in the AM fasting is 70-100. 101-125 is borderline, >125 is diabetes. Go see a diabetes doc and get an A1C test. Normal is up to 5.7. Pre-diabetic is 5.7 - 6.4. Diabetes is >6.4. Check out this link from the NIH: http://diabetes.niddk.nih.gov/dm/pubs/A1CTest/A1C_Test_DM_508.pdf. You need diabetic tx! ...Read more

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Can eating sugar a night before the fasting blood sugar test affect the results ?

Yes: You should not eat for 12 hours before a fasting test is done. You can have some water if thirsty. ...Read more

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How much blood is drawn for a fasting lipids test?

How much blood is drawn for a fasting lipids test?

No more than 10 ml: About one ml of serum is needed for the test and 4-5 ml will usually suffice. ...Read more

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How many hours should i be fasting before sugar blood test of pregnancy?

How many hours should i be fasting before sugar blood test of pregnancy?

Ask your OB MD: It may depend upon whether you are having a FBS(fasting blood sugar) & 2 hour post prandial(after eating) or full several hour Glucose Tolerance test(GTT) give your OB MD a call and find out. ...Read more

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Can Fasting Blood Sugar (FBS) be used for short-term monitoring of blood sugar level?

Can Fasting Blood Sugar (FBS) be used for short-term monitoring of blood sugar level?

FBS: I presume you have type 1 diabetes given your age. My apologies if your doctor has said you have type 2 diabetes and he is correct. Very unlikely unless you are substantially overweight. You should check your blood sugar almost all day if you have type 1 diabetes. There is excellent safe equipment for continuous blood sugar control. Can you please give me some more information about your diabetes. ...Read more

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What is a low blood glucose level after a one-hour glucose test during pregnancy?

THere are none: There are no low glucose levels with pregnancy gtt, only good normal levels. Hypoglycemaa doesn't occur in human beings who aren't receiving treatment for diabetes or have end stage cancer, liver or kidney failure, etc. Particularly in pregnancy, glucose normal levels are much lower than non-pregnancy, a lower number is an excellent sign, . ...Read more

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How do fasting insulin test and glucose test differ?

Different tests: Insulin & glucose are 2 different ways to measure diabetes. Insulin is produced by pancreas to keep sugars under control. We measure glucose to see how well sugars are controlled. We can measure Insulin to determine how much effort pancreas is making to control sugars. Think of glucose as speedometer & Insulin as tachometer (hgba1c is avg trip speed - ask a car nut if this doesn't make sense). ...Read more

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Why pregnant diabetics do fasting and pp test for sugar?

Why pregnant diabetics do fasting and pp test for sugar?

PREGNANT DIABETIC: It is more accurate to do lab .Diabetic pregnant mothers have big babies sometimes c/s has to be done during delivery. ...Read more