Oral Glucose Tolerance

A normal Oral Glucose Tolerance Test (OGTT) result for nonpregnant individuals includes fasting blood glucose levels under 100 mg/dL and 2-hour post-glucose levels below 140 mg/dL. For pregnant individuals, normal ranges are fasting levels under 92 mg/dL, 1-hour levels below 180 mg/dL, and 2-hour levels below 153 mg/dL.

Reading Oral Glucose Tolerance Test (OGTT) results involves comparing measured blood glucose levels at fasting, 1-hour, and 2-hour post-glucose intake against standardized thresholds. Elevated plasma glucose values can indicate abnormal glucose tolerance, prediabetes, or diabetes. The actual OGTT test report format may vary depending on the laboratory's preferred report format.

The WHO-prescribed rules for a 2-hour Oral Glucose Tolerance Test (OGTT) require an 8-hour fasting period before the test, during which patients consume a 75g glucose solution. Blood samples are taken before ingestion and at set intervals to measure the body's plasma glucose response.