FPG Test

measures blood glucose in a person who has not eaten anything for at least 8 hours. This test is used to detect diabetes and pre-diabetes. The FPG test is most reliable when done in the morning. Fasting Blood Glucose Test is convenient and has low cost. However, it sometimes misses diabetes or pre- diabetes and has to be confirmed with the OGTT. People with a fasting glucose level of 100 to 125 milligrams per deciliter (mg/dL) have a form of pre-diabetes called impaired fasting glucose (IFG). Having IFG means a person has an increased risk of developing type 2 diabetes but does not have it yet. A level of 126 mg/dL or above, confirmed by repeating the test on another day, means a person has diabetes.