Oral Glucose Tolerance Test

Glucose Challenge Test, Glucose Tolerance Test, OGTT (Oral Glucose Tolerance Test)

Test Overview

The oral glucose tolerance test (OGTT) measures the body's ability to use a type of sugar, called glucose, that is the body's main source of energy. An OGTT can be used to diagnose prediabetes and diabetes. An OGTT is most commonly done to check for diabetes that occurs with pregnancy (gestational diabetes).

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Author:	Christine Wendt, R.D., L.D.	Last Updated: July 14, 2009
Medical Review:	Caroline S. Rhoads, MD - Internal Medicine David C.W. Lau, MD, PhD, FRCPC - Endocrinology & Metabolism
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