Can’t Sleep?

Can't Sleep?

“Is Your iPad Causing Insomnia?”

By Dave From Paleohacks
Creator of the Paleohacks Cookbook

Recently revealed: What the blue light from our screens really does to our bodies…

Do you leave your PC, Mac or TV on in the bedroom, as you drift off to sleep each night? 

Millions of people do–without understanding the dramatic health consequences…

These wonderful devices changing our lives are all the rage.

Yet, they all do something which causes harm in humans. The blue light they emit impairs restful sleep.

How? Exposure prevents the release of melatonin–an essential hormone associated with sleep.

Unfortunately, blue light not only suppresses melatonin production and sleep…

  • It’s considered “carcinogenic pollution”–a recent murine study shows blue light correlates with higher cancer rates…
  • A lack of melatonin is linked to higher rates of breast, ovarian, and prostate cancers, while blocking blue rays with amber glasses is linked to lower cancer rates…
 

Not only is sleep impacted…

  • It also negatively influences thermoregulation, blood pressure and glucose homeostasis…
  • Exposure significantly impacts your own mood…
  • Lower melatonin in mice is linked with higher rates of depression…
  • And blue light exposure may be playing a role in the higher incidence of cataracts and macular degeneration seen today…

How Your Sleep is Compromised

Ordinarily, the pineal gland, a pea-size organ in the brain, begins to release melatonin a couple of hours before your regular bedtime. The hormone is no sleeping pill, but it does reduce alertness, making sleep more inviting.

However, light — particularly of the blue variety — can keep the pineal gland from releasing melatonin, thus warding off sleepiness.

You don’t have to be staring directly at a television or computer screen: If enough blue light hits the eye, the gland can stop releasing melatonin.

The Health Consequences Can 
Be Chronic and Terminal

Not only does this impact melatonin, a growing body of evidence suggests that a desynchronization of circadian rhythms plays significant role in various tumoral diseases, diabetes, obesity, and depression.

So light serves as a cue, but how?

It has long been known that the retina contains two types of photoreceptors, or light sensors: rods and cones. The cones allow us to see colors, while the ultra-sensitive rods are used for night vision, motion detection and peripheral vision.

Surprisingly, neither of them is the body’s primary tool for detecting light and darkness and synchronizing our circadian clocks.

There’s a third kind of sensor in our eyes, officially discovered in 2002. Called intrinsically photosensitive retinal ganglion cells, or ipRGCs, these relatively crude sensors are unable to pick up on low levels of light — from a dim night light, for example — but sluggishly signal light (to read more, click here)

Disclosure of Material Connection: Some of the links in the post above are “affiliate links.” This means if you click on the link and purchase the item, I will receive an affiliate commission. Regardless, I only recommend products or services I use personally and/or believe will add value to my readers. I am disclosing this in accordance with the Federal Trade Commission’s 16 CFR, Part 255: “Guides Concerning the Use of Endorsements and Testimonials in Advertising.”

 

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