Laboratory tests for blood:
| TEST | LEVEL OF SUGAR |
| Random blood sugar test | 200 milligrams per deciliter (mg/dL) OR higher = Diabetes |
| Fasting blood sugar test |
Less than 100 mg/dL is Normal 100 to 125 mg/dL is considered Prediabetes 126 mg/dL or higher on two separate tests, you have diabetes |
| Post-Prandial glucose test |
Up to 140 is normal 140-199 is Prediabetes ≥ 200 indicates Diabetes |
| Oral glucose tolerance test |
less than 140 mg/dL is normal between 140 and 199 mg/dL indicates prediabetes. more than 200 mg/dL after two hours indicates diabetes |
Random blood sugar test: A blood sample will be taken at a random time, regardless of when you last ate.
Fasting blood sugar test: A blood sample will be taken after an overnight fast.
Postprandial blood sugar test: Testing of blood sugar levels 2 hours after a meal.
Oral glucose tolerance test: For this test, you fast overnight, and the fasting blood sugar level is measured. Then you drink a sugary liquid, and blood sugar levels are tested periodically for the next two hours.
Glycated hemoglobin (A1C) test:
This blood test indicates your average blood sugar level for the past two to three months.
The higher your blood sugar levels, the more hemoglobin you'll have with sugar attached.
- An A1C level of 6.5 percent or higher on two separate tests indicates that you have diabetes.
- An A1C between 5.7 and 6.4 percent indicates prediabetes.
- Below 5.7 is considered normal.
