Everyone has an internal clock that sets their day and nighttime routines.
This clock is controlled by the hormone melatonin.
- The brain releases melatonin when it gets dark.
- In the teen years, melatonin is released later in the night.
- Other things that delay melatonin release:
- Overhead lights
- Blue lights from screens
- Content on devices (especially notifications, games, and social media)
