What does a person drink to perform an oral glucose tolerance test?

• A. 50 g of glucose solution
• B. 75 g of glucose solution
• C. 100 g of oral glucose solution
• D. 200 g of sugary drink

Answer: (C)

For an oral glucose tolerance test (OGTT), the standard procedure involves drinking a solution that contains 75 grams of glucose. This is the established amount used to assess how well the body processes glucose and is pivotal in diagnosing conditions such as gestational diabetes or type 2 diabetes.

The OGTT measures how effectively the body can manage a sudden influx of glucose. After consuming the glucose solution, blood samples are taken at regular intervals to measure glucose levels. This helps to evaluate insulin sensitivity and glucose metabolism.

While various amounts of glucose may be used in different contexts or modified protocols (such as a 50 g solution in some screening procedures), the definitive and widely accepted amount for diagnostic purposes in the OGTT is 75 grams. Therefore, the correct answer reflects the standard practice for this testing procedure.