Blue Light Scientific Studies

Blue Light Scientific Studies

The impact of blue light on our health and sleep has been a topic of numerous scientific studies. One such study by Harvard Medical School suggests that exposure to blue light at night can disrupt the body’s circadian rhythm and affect sleep quality.

Another study published in JAMA Internal Medicine found that exposure to artificial light at night, including blue light from electronic devices, is associated with an increased risk of obesity and other health problems.

A study featured on CNN also highlighted how exposure to light during sleep could lead to weight gain and potentially contribute to the risk of developing metabolic syndrome.

Here are the key points from the body of scientific research available on blue light:

  • Blue light, which is beneficial during daylight hours as it boosts attention, reaction times, and mood, can disrupt our sleep and potentially cause disease when we’re exposed to it after sundown. It throws our circadian rhythm out of balance, which can lead to sleep issues and may contribute to the causation of cancer, diabetes, heart disease, and obesity.
  • Blue light at night suppresses the secretion of melatonin, a hormone that influences circadian rhythms, more powerfully than other types of light. Even dim light can interfere with a person’s circadian rhythm and melatonin secretion.
  • Energy-efficient lighting, like compact fluorescent lightbulbs and LED lights, produce more blue light. These types of lights are more common in our environment, increasing our exposure to blue light.
  • Protecting oneself from blue light at night can include using dim red lights for night lights, avoiding looking at bright screens two to three hours before bed, and wearing blue-blocking glasses if one works a night shift or uses a lot of electronic devices at night.

If you work a night shift or use a lot of electronic devices at night, consider wearing blue-blocking glasses and installing an app that filters the blue/green wavelength at night.

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