You can think of artificial blue light as “junk light.” Since humans evolved for hundreds of thousands of years without artificial light, this unnatural light is incompatible with our biology and contributes to a host of health issues over time. Our exposure is increasing at a rapid rate and a growing field of research has linked blue light to a number of health issues.
Excess blue light can directly damage your eyes causing eye strain, screen fatigue, headaches, retinal damage and may contribute to the development of cataracts and macular degeneration. Systemically, artificial blue light (especially at night) disrupts your circadian rhythm also known as your internal body clock or sleep-wake cycle.
Natural blue light from the sun tells your brain it’s day time causing your body to be alert and energized. When the sun sets, absence of light causes the release of your master sleep hormone and antioxidant, melatonin. Artificial blue light at night confuses your body into thinking it’s still daytime and suppresses the release of melatonin. Without melatonin your body cannot get deep and restorative sleep which contributes to nearly every chronic disease. One study even showed that artificial light is strongly associated with ALL cancers, YIKES!