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Circadian Rhythms

A circadian rhythm is essentially an organism's daily internal clock. It is not restricted to humans and exists in most living things, even bacteria. For us, the circadian clock follows a roughly 24-hour cycle, responding primarily to light and darkness in our environment, and acting to regulate countless bodily functions. One of the most important hormones in this context is melatonin, which is released by the pineal gland in the brain and is involved with sleepiness and sleep regulation.

Research analysis led by and reviewed by the Examine team.
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