Sleep Improved by Eliminating Nighttime Blue Light

University Heights, OH (PRWEB) April 04, 2012

Researchers at the Surrey Sleep Research Centre at the University of Surrey, UK recently published a study1 showing nighttime light exposure affects the human biological clock and disrupts sleep quality by suppressing the hormone melatonin. A significant finding was that the spectral composition – the actual color of light – not only contributed to the level of deep sleep but also the time taken to reach such a level. Researchers focused on blue-sensitive photoreceptors within the retina of the human eye which in turn controls the brains pineal gland. They discovered that when these photoreceptors were exposed to nighttime blue light the pineal gland suppressed the production of melatonin. Previous evidence has shown that natural melatonin production is vital not only to quality sleep but in maintaining ones overall health through the prevention of certain types of cancer and Type 2 Diabetes2,3 . Years before this study was published a team of scientists at John Carroll University developed special light bulbs that do not produce the blue wavelength responsible for melatonin suppression and eyeglasses that block this detrimental blue light. Information about these products and research supporting their use are available at

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