12 doctors weighed in:
What is the best way to test a person to see if they are diebetic?
12 doctors weighed in

Marianne DiNapoli
Obstetrics & Gynecology
6 doctors agree
In brief: Blood sugar
Blood sugar is a test for diabetes that can be measured at various times.
A fasting blood sugar should be less than 100 mg/dl, and a blood sugar taken randomly should not exceed 200 mg/dl. Blood sugar 2 hours after a meal should be less than 140. If you think you might have diabetes, you should see a physician to check your blood sugar. A blood test called A1c can also be done. No fasting needed.

In brief: Blood sugar
Blood sugar is a test for diabetes that can be measured at various times.
A fasting blood sugar should be less than 100 mg/dl, and a blood sugar taken randomly should not exceed 200 mg/dl. Blood sugar 2 hours after a meal should be less than 140. If you think you might have diabetes, you should see a physician to check your blood sugar. A blood test called A1c can also be done. No fasting needed.
Marianne DiNapoli
Marianne DiNapoli
Answer assisted by Marianne Di Napoli, Medical Student
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Dr. Peter Kurzweil
Internal Medicine
3 doctors agree
In brief: Hemoglobin A1C
Certain microscopic cell changes may occur first, but these are used for research.
Normal bs after an 8 hour fast is 65-100 mg. 'impaired glucose tolerance' is FBS 100-126. High bs is >126, diabetes mellitus, type 2; must be done at least twice to make dx. Hgb A1c is a more accurate test, because it measures what the average sugar has been over about 6 weeks. A confirmed HGB A1c over 6 makes dx.

In brief: Hemoglobin A1C
Certain microscopic cell changes may occur first, but these are used for research.
Normal bs after an 8 hour fast is 65-100 mg. 'impaired glucose tolerance' is FBS 100-126. High bs is >126, diabetes mellitus, type 2; must be done at least twice to make dx. Hgb A1c is a more accurate test, because it measures what the average sugar has been over about 6 weeks. A confirmed HGB A1c over 6 makes dx.
Dr. Peter Kurzweil
Dr. Peter Kurzweil
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Safa Lohrasbi
General Practice
In brief: Blood Glucose Check
The best screening test for evaluating if a person is diabetic checks the baseline amount of glucose (sugar) circulating in someone's blood when they have fasted (no food or drink) for ~8 hours.
Such tests are easily obtained at almost any doctor's office, and often provided at screening health fairs.

In brief: Blood Glucose Check
The best screening test for evaluating if a person is diabetic checks the baseline amount of glucose (sugar) circulating in someone's blood when they have fasted (no food or drink) for ~8 hours.
Such tests are easily obtained at almost any doctor's office, and often provided at screening health fairs.
Safa Lohrasbi
Safa Lohrasbi
Answer assisted by Safa Lohrasbi, Medical Student
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