Blue Light & Sleep
Many (many) years ago,our ancestors woke up and went to bed with the rising and setting sun. The morning light helped increase their cortisol levels which helped wake them up for the day. Throughout the day cortisol their levels steadily decline reaching their lowest point about two hours after sleep. This natural sleep-wake cycle is called our circadian rhythm, and in an ideal work this natural rhythm should be as present in our lives today as it was for our ancestors. Unfortunately, it’s not so straight forward anymore, and blue light interference is playing an increasing part.

In our modern day and age, nighttime exposure to blue light from our electronic devices elevates cortisol at the wrong time of day. This is one factor why so many people are experiencing difficulties falling asleep and/or staying asleep. And naturally this spills over into the next day making it harder to wake up, leaving us feeling less energised and causing us to rely more heavily on caffeine and sugar to get through the day.  All of these factors drains us physically and mentally.

Melatonin, another hormone related to our sleep wake cycle is produced in the evening as the sun begins to set.  Melatonin slowly lowers throughout the night and reaches its lowest point in the morning when it is time to wake up. Melatonin requires lower light, such as the setting sun, in order to be produced. So evening exposure to blue light whether from our light bulbs or devices not only increases cortisol at the wrong time of day but it also halts the production of melatonin. This means we will find it hard to sleep because our hormones will not allow us to be ready for sleep at a reasonable time.
October 24, 2018 by Boca Blu Admin Team

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