blue light insomnia

now, in much of the world, evenings are illuminated, and we take our easy access to all those lumens pretty much for granted. not all colors of light have the same effect. and the proliferation of electronics with screens, as well as energy-efficient lighting, is increasing our exposure to blue wavelengths, especially after sundown. a harvard study shed a little bit of light on the possible connection to diabetes and possibly obesity. exposure to light suppresses the secretion of melatonin, a hormone that influences circadian rhythms.




harvard researchers and their colleagues conducted an experiment comparing the effects of 6.5 hours of exposure to blue light to exposure to green light of comparable brightness. the fact that the levels of the hormone were about the same in the two groups strengthens the hypothesis that blue light is a potent suppressor of melatonin. if blue light does have adverse health effects, then environmental concerns, and the quest for energy-efficient lighting, could be at odds with personal health. led lights are more efficient than fluorescent lights, but they also produce a fair amount of light in the blue spectrum. as a service to our readers, harvard health publishing provides access to our library of archived content. get helpful tips and guidance for everything from fighting inflammation to finding the best diets for weight loss…from exercises to build a stronger core to advice on treating cataracts.

learn more our dedicated team rigorously evaluates every article and guide to ensure the information is factual, up-to-date and free of bias. decreasing exposure to light in the evening, and blue light, in particular, is an important way to help your body naturally prepare for sleep. our eyes interpret colors of light based on the amount of energy they contain. blue light is a portion of the visible light spectrum that can have unique effects on alertness, hormone production, and sleep cycles. with the advent of artificial light and electronics, people are being exposed to increasing amounts of light before bedtime. we get the most of our exposure to blue light from the sun. during the day, blue light can improve performance and attention, tuning our circadian rhythm and setting us up for a better night’s sleep after the sun sets.

blue light suppresses the body’s release of melatonin, a hormone that makes us feel drowsy. with the significant health consequences associated with exposure to blue light after dark, it’s important to understand the sources of blue light and ways to reduce the risks. the good news is that the risks of nighttime blue light exposure can be reduced through relatively simple and fast methods. the most effective way to reduce exposure to blue light in the evening is to simply turn off the sources. dr. singh is the medical director of the indiana sleep center. our editors and medical experts rigorously evaluate every article and guide to ensure the information is factual, up-to-date, and free of bias. dr. singh is the medical director of the indiana sleep center.

while light of any kind can suppress the secretion of melatonin, blue light at night does so more powerfully. harvard researchers and their colleagues conducted the use of light-emitting electronic devices before bedtime may contribute to or exacerbate sleep problems. exposure to blue-wavelength blue light in the evening tricks your brain into thinking it’s daytime, which inhibits the production of melatonin and reduces both the quantity and quality of, blue light melatonin myth, blue light melatonin myth, blue light at night is killing you, does blue light filter help sleep, blue light screen.

the use of blue light-emitting electronic devices in the hours right before sleep can negatively impact overall health, alertness, and the circadian clock. in wyatt’s view, recommendations around limiting blue light have far outpaced science around its effects. there is a valid scientific basis to melatonin levels naturally start to rise in our bodies about two hours before we fall asleep, and remain high while we’re sleeping. but exposure, blue light effect, sleeping with blue led lights, blue light and sleep ncbi, blue light led, what does blue light do to your brain, where does blue light come from, what is blue light on phone, is blue light a myth, blue light lamp, blue light room therapy.

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