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A cortisol test measures the level of the hormone cortisol in a 24-hour sample of urine. The cortisol level may show problems with the adrenal glands or the pituitary gland. Cortisol is made by the adrenal glands.
What is Cortisol? Cortisol is an important hormone produced by the adrenal glands, small endocrine glands that sit on top of our kidneys. Cortisol is secreted by the body in response to stress, and is one of the hormones our bodies secrete in what is known as the fight or flight response.. Cortisol, in turn, plays an important role in everything from how our bodies use glucose (sugar), to our blood pressure, to the function of our immune systems.