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Even Small Amounts of Light Disrupts Sleep

Exposure to light at night can disrupt the body's natural sleep-wake cycle, leading to chronic sleep disruption

Exposure to light at night can disrupt the body’s natural sleep-wake cycle, leading to chronic sleep disruption, according to experts. 

Melatonin, a hormone that regulates sleep and wakefulness, is suppressed by exposure to light at night, particularly the blue light emitted by electronic devices such as smartphones and tablets. 

Chronic sleep disruption has been linked to a range of health problems, including obesity, diabetes, and cardiovascular disease. 

To promote healthy sleep, experts recommend minimizing exposure to light at night by avoiding electronic devices, using blackout curtains or eye masks, and keeping the bedroom cool and quiet. “Light exposure at the wrong time of day can shift your circadian rhythm and have consequences on your health,” says neurologist Dr. Alon Avidan at the University of California, Los Angeles.

  • Exposure to light at night can disrupt the body’s natural sleep-wake cycle.
  • Blue light emitted by electronic devices can suppress the production of melatonin and interfere with sleep.
  • Chronic sleep disruption has been linked to a range of health problems.
  • To promote healthy sleep, experts recommend minimizing exposure to light at night.
  • “Light exposure at the wrong time of day can shift your circadian rhythm and have consequences on your health,” says Dr. Alon Avidan.

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