![]() In other words, though it may be a potential trigger for health issues, its impact has been blown way out of proportion. ![]() “Blue light has become the gluten of the sleep world,” Goldstein says with a laugh. “For this to get extrapolated to saying ‘blue light at night isn’t bad for you’ is a little bit of an extension,” Goldstein says.īut that doesn’t mean blue light is evil. Taken together, Goldstein says these conditions mean the study’s results apply only to a very narrow set of circumstances and metrics. They also kept light levels dim, regardless of color, which may not reflect the bright lights of electronics.Īnd finally, though mice are frequently used in sleep research, Goldstein notes that since the rodents are nocturnal, they may respond differently to light than humans do. The researchers looked specifically at cones in the animals’ eyes, which detect color, instead of melanopsin, which senses light and is central to the issue of melatonin secretion. Cathy Goldstein, a sleep specialist at Michigan Medicine. And there are additional caveats to this particular paper, says Dr. Does the new study change that theory?Īnimal studies should always be taken with a grain of salt, as they often do not translate directly to human behavior. IPad readers started producing melatonin 1.5 hours later than usual the next day, and experienced REM sleep-the phase during which dreams occur and memories are consolidated-once they conked out, the study found. One highly cited study from 2014 showed that using a blue-light-emitting iPad before bed suppresses melatonin, while reading a traditional book does not. Melanopsin, the pigment that helps eye cells assess light brightness, is particularly sensitive to shorter, cooler wavelengths like blue light, which some research says means blue light may affect the body more dramatically than other hues. Studies have suggested that blue light is an especially powerful melatonin suppressant.
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