Evidence shows blue light from screens is anxiogenic and detrimental to healthy sleep | Matthew Walker

Parent Episode: Dr. Matthew Walker on Sleep for Enhancing Learning, Creativity, Immunity, and Glymphatic System

Melatonin, a hormone that regulates the sleep-wake cycle in mammals, is regulated by exposure to light. Decreasing the amount of light in our environment – especially the blue light from the various screens that surround us – is crucial for a good night's sleep. In fact, research shows that reading a book on a device rather than reading an actual book reduces melatonin production by as much as 20 percent. In this clip, Dr. Matthew Walker describes the negative effects of blue light exposure on melatonin production and, subsequently, sleep.

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