An oral glucose tolerance test (OGTT) measures how well a human body’s cells are able to take up glucose from the blood after consuming a specific amount of sugar. This test can be used to find undiagnosed diabetic patients or patients with low glucose tolerance.
For this method, the patient is given a predefined amount of glucose. Glucose is taken up into the blood, which in healthy patients stimulates insulin production, that is needed for transport of glucose into the cells. After two hours, the ability of the patient to normalise glucose levels is determined by analysing the amount of glucose in the plasma.