When is cortisol usually at its lowest concentration in the circulation?

Name: When is cortisol usually at its lowest concentration in the circulation?
Brand: Quizplus
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Question

Quizplus · Accepted Answer

To differentiate patients with Cushing's syndrome from healthy patients, it is best to take the sample at the time when cortisol is usually at its lowest concentration in the circulation.This time happens to be at midnight, and because it is not always practical to draw blood at this time, the more practical time of 4:00 pm is often chosen.

When Is Cortisol Usually at Its Lowest Concentration in the Circulation