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Blue Light, Melatonin, and Sleep

These 3 things share a close relationship – how do they impact your health?


Melatonin is a natural hormone produced by the body. When your body senses light diminishing, it starts to release melatonin. Melatonin is associated with the regulation of sleep, as well as circadian rhythm regulation (day/night cycle), mood, reproduction, and immune system function.

Blue LightBlue light child in bed

Blue light is produced by many things, the most common being the sun (after passing through our atmosphere). It is also produced by technology, such as smartphones, laptops, computers, and other electronic devices. Fluorescent and LED lighting also produces blue light.

Blue Light’s Effect on Melatonin Production and Sleep

Blue light is a common sleep disrupter. It actually decreases your natural melatonin production in the body, which can disrupt your sleep, along with other significant processes in the body.  Blue light affects your body’s ability to tell if it is day or night, so if your body thinks it’s daytime, it’ll be harder for you to fall asleep at night. This is especially true in young children.

Eliminating Blue Light

There are so many sources of blue light that it may be hard to eliminate all of them. Some recommendations are:

  • Limit technology exposure at least an hour before bedtime
  • Turn on “night mode” on your phone – shifting from the blue cooler tones to warmer tones. Check out your display settings for this function.
  • Use red light night lights
  • Stay off your cell phone before bed (or television, laptop, etc…)

0 Join the Conversation

  1. EShine says
    Oct 06, 2020 at 8:49 AM

    Thanks for sharing this precious information with us this is really helpful for me and also looking for my upcoming project so i hope you to add some more information like this in future as well

    • says
      Dec 07, 2020 at 9:49 AM

      Thanks for your feedback! If you have any other ideas for blogs you'd like to see, let us know!

  2. kimmy kervel says
    Feb 03, 2021 at 9:32 AM

    this is mind blowing information, thanks for sharing this is really helpful for me

    • says
      Feb 03, 2021 at 7:21 AM

      Glad you found this info helpful!

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