Circadian rhythm is a roughly 24-hour cycle in the physiological processes of living beings, including humans, animals, plants, and even some bacteria. These rhythms are driven by an internal "biological clock" and respond to external cues such as light and temperature.
The most well-known circadian rhythm in humans is the sleep-wake cycle, but other processes such as hormone production, body temperature, and metabolism also follow circadian rhythms. The dysregulation of circadian rhythms has been linked to a variety of health problems, including insomnia, depression, and chronic diseases such as diabetes and cancer.
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