Which hormone is most closely linked to stress in the human body?
Quick Answer
Cortisol is the body’s best-known stress hormone. It helps mobilize energy and follows a daily rhythm, usually peaking in the morning.
The Full Story
Cortisol is a steroid hormone produced by the adrenal glands and regulated by the hypothalamic-pituitary-adrenal axis. It helps the body respond to stress by increasing available energy, influencing metabolism, and modulating inflammation. Cortisol also follows a natural daily cycle, often highest shortly after waking and lower at night. In the short term it is useful, but prolonged elevation can be harmful. Because of this, cortisol is central to research on stress, sleep, and mental health.
Key Facts
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"The hormone that helps you cope, but only in the right amount."
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