Waking up does not activate an increase in the release of the stress hormone cortisol. Cortisol does, however, increase in the hours prior to wakening as part of the body's preparation for the ...
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What Is Cortisol?
Cortisol, or hydrocortisone, is the body's stress hormone. The adrenal glands, located on top of the kidneys, release cortisol to provide energy and increase alertness in response to stress.