Evening Smartphone Use Suppresses Melatonin Production and Disrupts Sleep Cycles
Evening smartphone use suppresses melatonin production through blue light exposure, resulting in delayed melatonin onset, shorter duration, and poorer sleep quality.
- Smartphone screens emit blue light that mimics daytime, suppressing melatonin and keeping the brain alert.
- Evening phone use significantly reduces melatonin production, delaying its onset and shortening duration.
| Metric | Scientific Observation | Impact Magnitude | ||
|---|---|---|---|---|
| Evening Screen Exposure | Greater melatonin suppression vs. dim light | Dose-response on duration | ||
| Melatonin Onset Delay | Disrupted hormone rhythm after use | 1-2 hours to restore | ||
| Sleep Quality | Longer fall asleep time, poorer quality | Affects next-day mood |