Glucose tolerance test

• A
• B
• C
• D
• E
• F
• G
• H
• I
• J
• K
• L
• M
• N
• O
• P
• Q
• R
• S
• T
• U
• V
• W
• X

Fasting glucose tolerance test

Oral glucose tolerance test

Urine sample

Oral glucose tolerance test

Normal blood values for a 75-gram oral glucose tolerance test used to check for type 2 diabetes:

• Fasting: 60 to 100 mg/dL
• 1 hour: less than 200 mg/dL
• 2 hours: less than 140 mg/dL. Between 140-200 mg/dL is considered impaired glucose tolerance or pre-diabetes. This group is at increased risk for developing diabetes. Greater than 200 mg/dL is diagnostic of diabetes mellitus

Normal blood values for a 50-gram oral glucose tolerance test used to screen for gestational diabetes:

• 1 hour: less than 140 mg/dL

Normal blood values for 100-gram oral glucose tolerance test used to screen for gestational diabetes:

• Fasting: less than 95 mg/dL
• 1 hour: less than 180 mg/dL
• 2 hour: less than 155 mg/dL
• 3 hour: less than 140 mg/dL

Greater than normal levels of glucose may mean you have diabetes or gestational diabetes.

However, high glucose levels may be related to another medical problem (for example, Cushing syndrome).

Review Date: 08/11/2006
Reviewed By: Robert Hurd, MD, Department of Biology, College of Arts and Sciences, Xavier University, Cincinnati, OH. Review provided by VeriMed Healthcare Network.