How many of us check our iPads or tablets for emails before going to bed? I know I do and I suspect that most of you do too. Well, it turns out that might be why you are having trouble getting to sleep because the light from your iPad or computer may be suppressing the production of the sleep inducing hormone, melatonin.
Melatonin is a natural hormone produced by the pineal gland located above the middle of the brain. According to the National Sleep Foundation, it is "turned off" during the day and becomes active around 9 pm as light is reduced. Melatonin remains in the blood for about 12 hours and is virtually absent from the blood during the day. Many people with sleep problems take supplements of melatonin in the hopes of elevating their levels of melatonin to aid in sleeping. The answer to their problem, however, might be to just turn off that iPad several hours before going to bed.
In an article in The New York Times today, there is a discussion of a study published in the journal, Applied Ergonomics which strongly suggests that there is a connection between the bright light of the iPad and the suppression of melatonin in the hour or so before trying to fall asleep. According to the article, studies have shown that two hours of exposure to the iPad's screen can reduce the amount of melatonin in the bloodstream by up to 22 percent.
Given these studies, it seems like a no brainer: stop using that iPad or other device and sleep better.
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