How Blue Light Affect Sleep? The Sleep Doctor

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Hi and welcome back. I'm Dr. Michael Breus, the sleep doctor. I'm a clinical psychologist and board certified sleep specialist for the next few minutes. I'm going to teach you ways to get better sleep so you can perform and think at your best.

In another study, comparing the effects, different colors of light in the visible light spectrum have on humans and sleep. Blue light was also found to alter your circadian rhythm by twice the degree of other colors by interfering with your body's 24 hour circadian rhythm. Blue light can have a significant detrimental effect on your health by creating problems with your cardiovascular, metabolic and immune systems and also disrupting your mood and compromising your cognitive functions when your circadian rhythm is out of sync. You think, feel and perform below your best, and over time your health can be put at risk. And out of all of the colors of the spectrum, blue light is hurting your circadian rhythm the most.

In addition to disrupting your circadian rhythm, researchers have also found that blue light prevents your body temperature from dropping during the night, which is one of the key elements of your body's progression into sleep. If your body temperature doesn't drop, you won't sleep well. These researchers found that blue light exposure keeps your body temperature elevated to daytime levels because basically it thinks your body's in the daytime. And that's the big takeaway. Blue light makes your body think its daytime, so your body responds and behaves as if it needed to be awake and active.

A key component of the study compared the effects of blue light and red light, a longer wavelength light at the other end of the visible light spectrum. Scientists found that red light exposure during the same two hour evening time period did not interfere with sleep and circadian biology the way that blue light did. Body temperature lowered and sleep progressed as normal. The takeaway? Nighttime at blue light exposure is harmful to sleep and circadian rhythms, taking steps to manage blue light exposure and limited, including using red light sources during the evening hours and filtering out the blue can make a real difference to your sleep and consequently your overall health.

To Summarize:
I want to thank you all for joining me again, and I encourage you to keep watching this series so you can learn more of my tools, hacks and knowledge that can get the rest you deserve so you can start functioning at your peak performance. Remember to subscribe to this channel and tell your friends about this series so they can also achieve a great night's sleep. Be well and see you next time. This is Dr. Michael Breus. Wishing you sweet dreams.

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