Scientific Research on Blue Light and its Effects

Scientific Research on Blue Light and its Effects

A significant amount of research has been done on blue light and its effects on our health. Unfortunately many people are completely unaware of blue light, let alone how it disrupts our hormones and sleep. See below for a brief list of peer reviewed studies on blue light.

Blue light and health


“Increasing the blue portion of artificial light may improve performance and learning ability in school kids and employees working indoors, and health will be improved in patients staying at nursing homes or hospitals.” 
“...a reduction of the blue portion in artificial light during nighttime hours could protect shift workers against disorders such as cancer and cardiovascular disorders as well as reduce sleep disturbances and their consequences among the general population.”


Blue light and sleep


“These findings indicate that room light exerts a profound suppressive effect on melatonin levels and shortens the body's internal representation of night duration. Hence, chronically exposing oneself to electrical lighting in the late evening disrupts melatonin signalling and could therefore potentially impact sleep, thermoregulation, blood pressure, and glucose homeostasis.”


“Furthermore, this data also suggest that the pattern of daily light exposure to both bright outdoor illumination during the day-time as well as indoor artificial illumination during both day-time and night-time significantly contributes to the subsequent timing and entrainment of the circadian pacemaker.”


    We have shown that circadian, neuroendocrine, and neurobehavioral responses to light, and even visual awareness of light, are retained in visually blind subjects lacking functional outer retinae, confirming in humans the recent remarkable discovery of a novel photoreceptor system in the mammalian eye.”


    The human circadian pacemaker is exquisitely sensitive to ocular light exposure, even in some people who are otherwise totally blind. The magnitude of the resetting response to white light depends on the timing, intensity, duration, number and pattern of exposures. We report here that the circadian resetting response in humans, as measured by the pineal melatonin rhythm, is also wavelength dependent.”

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