What Happens When We Check Our Smartphones before Bed?

Here's some easy health advice we should all take with us into the New Year.


Many of us have heard the medical advice that we shouldn't check our electronic devices before bed. It disrupts our sleep. Other than setting back our biological clocks a bit, what harm could checking Facebook before bed have on my health?

A lot, according to a new video released by Business Insider. There's a dangerous chain reaction this habit sets in motion. Dr. Daniel Siegel walks viewers through what happens when we take out our phones right before bed.

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The light from a smartphone releases a stream of photons, telling our brains not to secrete melatonin — the chemical responsible for making us feel tired. So, we feel awake, and this leads us to continue to browse our smartphones, because why not? We're still awake. This leads us to clock in less hours of sleep each night.

Scientists are beginning to discover just how important sleep is to maintaining our physical and mental wellbeing. Deepak Chopra, co-founder of The Chopra Center for Wellbeing, says, “Seven to eight hours of sleep every night without drugs or induced by alcohol, is absolutely essential for your body to remain in good health, to remove the amyloid from your brain that causes premature dementia and Alzheimer's and to actually self-regulate the cellular activity in your entire body.” 

At night, the glial cells are doing their work, cleaning up the toxins that our neurons produce. Scientists have found a link between poor sleep and Alzheimer's disease, saying that it's caused by a breakdown in the brain's several disposal processes.

For the vast majority of us, we need our seven to nine hours of sleep in order to clean out these toxic chemicals in our brains, allowing us to maintain mental and physical health for the day and years ahead. Siegel recommends giving ourselves an hour buffer between our electronic screens and bed time, advice I'm going to heed.

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Natalie has been writing professionally for about 6 years. After graduating from Ithaca College with a degree in Feature Writing, she snagged a job at PCMag.com where she had the opportunity to review all the latest consumer gadgets. Since then she has become a writer for hire, freelancing for various websites. In her spare time, you may find her riding her motorcycle, reading YA novels, hiking, or playing video games. Follow her on Twitter: @nat_schumaker

Photo Credit: AFP / Stringer/ Getty

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Scientists study tattooed corpses, find pigment in lymph nodes

It turns out, that tattoo ink can travel throughout your body and settle in lymph nodes.

17th August 1973: An American tattoo artist working on a client's shoulder. (Photo by F. Roy Kemp/BIPs/Getty Images)
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In the slightly macabre experiment to find out where tattoo ink travels to in the body, French and German researchers recently used synchrotron X-ray fluorescence in four "inked" human cadavers — as well as one without. The results of their 2017 study? Some of the tattoo ink apparently settled in lymph nodes.


Image from the study.

As the authors explain in the study — they hail from Ludwig Maximilian University of Munich, the European Synchrotron Radiation Facility, and the German Federal Institute for Risk Assessment — it would have been unethical to test this on live animals since those creatures would not be able to give permission to be tattooed.

Because of the prevalence of tattoos these days, the researchers wanted to find out if the ink could be harmful in some way.

"The increasing prevalence of tattoos provoked safety concerns with respect to particle distribution and effects inside the human body," they write.

It works like this: Since lymph nodes filter lymph, which is the fluid that carries white blood cells throughout the body in an effort to fight infections that are encountered, that is where some of the ink particles collect.

Image by authors of the study.

Titanium dioxide appears to be the thing that travels. It's a white tattoo ink pigment that's mixed with other colors all the time to control shades.

The study's authors will keep working on this in the meantime.

“In future experiments we will also look into the pigment and heavy metal burden of other, more distant internal organs and tissues in order to track any possible bio-distribution of tattoo ink ingredients throughout the body. The outcome of these investigations not only will be helpful in the assessment of the health risks associated with tattooing but also in the judgment of other exposures such as, e.g., the entrance of TiO2 nanoparticles present in cosmetics at the site of damaged skin."

Photo by Alina Grubnyak on Unsplash
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