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Fasting blood sugar reference range

A 41-year-old female asked:
Dr. Rachel Chastanet
Bariatrics 35 years experience
About 140: Any blood sugar at any time over 200 (two episodes) is diagnosed as Diabetes. Normal level for fasting is under 100. There is no standard, per se, f... Read More
A 29-year-old female asked:
Dr. Richard Bensinger
Ophthalmology 53 years experience
Normal values: These values are in the normal range. Keep up whatever you are doing with diet and exercise.
A 60-year-old male asked:
Dr. Michael Haghighi
Family Medicine 24 years experience
60-120: If you are referring to glucometer readings then 60-120 again be careful with proximity of the upper and lower reference ranges.
Dr. Gurmukh Singh
Pathology 50 years experience
70-100 mg/dL: Normal fasting blood sugar is 70-100. Between 100-125 is pre-diabetes. Two fasting blood sugar levels of 126 or higher is diagnostic of diabetes. Cons... Read More
A 67-year-old male asked:
Dr. Bruce Evans
Orthopedic Surgery - Reconstruction 41 years experience
Need med change: I assume the values you are quoting is your a1c levels as fasting glucose should be around 80-120. You need to have someone re-evaluate your medicati... Read More
A 28-year-old male asked:
Dr. Philip Kern
Endocrinology 44 years experience
Measuring hormones: The main concern I have is why are all these hormone levels being measured? The cortisol is supposed to be high in the am. Glucagon is supposed to b... Read More
A 27-year-old male asked:
Dr. Tony Willson
Family Medicine 18 years experience
Caution: This represents an abnormally high glucose level bordering diabetes. Two readings fasting >126 confirms diabetes. See your doc about a test calle... Read More
A 28-year-old male asked:
Dr. Yash Khanna
Family Medicine 58 years experience
12 hours of fasting: Fasting blood sugar is blood level of blood glucose after fasting(not eating) for 8 to 10 hours.Normal range is 70 to 100.
A 43-year-old member asked:
Dr. David Sneid
Endocrinology 42 years experience
See below: Whole blood sugar is before the liquid (plasma) is separated from the cells. Plasma glucose values are generally 10-12% higher than whole blood value... Read More
A 40-year-old member asked:
Dr. Guillermo Martinez-torres
Pathology 34 years experience
Yes: Usually a fasting glucose of less than 100 is considered a normal result.
A 32-year-old member asked:
Dr. David Sneid
Endocrinology 42 years experience
If fasting overnight: And drawn out of a vein by a lab, it's less than 100. Check diabetes.Org.
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