The glucose tolerance test challenges the body's ability to secrete and use insulin, performed after a fast.

The answer is it is performed after a 10 hour fast. Glucose tolerance tests are also used to make a diagnosis to diabetes. The OGTT is used to monitor for, or diagnose diabetes in people with a fasting blood glucose level that is high, but is not high enough (above 125 mg/dL or 7 mmol/L) to meet the diagnosis for diabetes.

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the truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey.