Your body has an internal 24-hour clock
Your body's internal 24-hour clocks, called circadian rhythms, control sleep, hormones, and metabolism, profoundly impacting your health and daily function.
Your body runs on an amazing internal 24-hour clock, called circadian rhythms, that orchestrates when you sleep and wake. This master clock, located in your brain, uses light cues to tell your body when to produce sleep-inducing melatonin or keep you alert.
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