Dr. Daniel Siegel, a psychiatrist from UCLA, states that staring into a glowing screen late at night is harmful to your brain and body. Staring at any screen at bedtime, be it computer, smartphone, or ipad, is worse than previously thought. The photons emitted send a message to the brain to stay awake and prevents the production of melatonin. As you stay awake longer, you may continue to use your device, which leads to less sleep for the night. Most people need seven to nine hours of sleep for their bodies to be fully rested. Getting less sleep keeps toxins from being flushed from your system. This makes you have poor ability to focus, impaired memory, and weight gain. Dr. Siegel suggests shutting off your devices at least an hour before bedtime so your brain has time to unwind.
Gmoser, Justin. “This is what happens to your brain and body when you check your smartphone before bed.” Science. Business Insider, 8 Apr 2015. Web. 27 Apr 2015.