human circadian rhythm

The human circadian rhythm is a natural, internal process that regulates the sleep-wake cycle over a 24-hour period. Influenced by natural light and darkness, it helps determine when we feel awake or sleepy. This rhythm is controlled by biological clocks in the brain, which respond to environmental cues. Disruptions, such as shift work or excessive screen time at night, can lead to sleep problems and affect overall health. Understanding and respecting our circadian rhythm can improve sleep quality, mood, and overall well-being.