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Artificial Light Destroying Your Sleep and Eyes

author avatar Dr. Eric Berg 08/05/2024

Have you ever noticed how hard it is to fall asleep after scrolling through social media? Or maybe you've felt wired and restless even after putting in a full day?

You might be surprised to learn that the sneaky culprit behind these issues could be blue light sleep effects. While light is essential to regulate our natural sleep-wake cycle, not all light is created equal. Light blocking is an important consideration.

Blue Light and Its Effects on Sleep

We’re exposed to a visible light spectrum every day, each with a different energy level and wavelength light. Blue light, located on the higher end of the energy spectrum, is emitted naturally by the sun but also by our favorite electronic devices.

This includes smartphones, laptops, tablets, and even energy-efficient LED lights. These devices emit blue light.

While beneficial during the day, promoting alertness and boosting mood and cognitive function, blue light exposure at night can wreak havoc on our sleep. Blue light sleep effects go beyond just difficulty falling asleep. They can also affect your sleep cycles.

How Blue Light Disrupts Your Sleep

Blue light impacts our sleep primarily by interfering with the production of melatonin. This hormone plays a crucial role in regulating our circadian rhythm - our body’s natural sleep-wake cycle.

As the sun sets and natural blue light diminishes, our bodies start producing melatonin, signaling it’s time to wind down for sleep.

However, when we expose ourselves to artificial light at night, it throws off our natural rhythm. This light suppresses melatonin production and keeps us alert when we should be preparing for sleep.

Over time, the constant disruption of this delicate hormonal balance caused by blue light can have detrimental effects, contributing to various health issues beyond poor sleep. This is why many shift workers struggle to get a good night's sleep.

The Far-Reaching Effects of Blue Light

Beyond making it difficult to fall asleep and enjoy deep, restful sleep, blue light sleep effects extend beyond our sleep quality.

Increased Risk of Chronic Diseases

Studies link prolonged exposure to blue light, especially at night, to an increased risk of developing various chronic diseases, including:

  • Obesity and weight gain: By disrupting melatonin production, blue light can affect hormones that regulate metabolism and appetite, potentially leading to weight gain.

  • Heart disease: Disrupted sleep patterns caused by blue light can lead to increased heart rate and blood pressure, putting extra strain on the cardiovascular system.

  • Type 2 Diabetes: Blue light's disruption of metabolic processes and sleep-wake cycles can impair the body's ability to regulate blood sugar levels, increasing the risk of type 2 diabetes.

  • Certain cancers: Emerging research suggests a possible link between nighttime blue light exposure and certain cancers due to the hormone-disrupting effects.

Eye Strain and Headaches

Blue light has been linked to digital eye strain. The high-energy wavelengths of blue light can cause eye fatigue, dryness, headaches, and blurry vision, particularly with prolonged exposure from digital screens.

This can further worsen sleep problems and create a vicious cycle. Blue wavelengths are known to contribute to eye strain.

Mental Health Issues

Exposure to blue light at night can negatively impact mood and mental health by disrupting our natural sleep-wake cycle and the body's release of hormones. This can contribute to:

  • Increased stress and anxiety.

  • Mood swings.

  • Difficulty concentrating.

  • Worsening symptoms of depression.

Woman in a bed

Reducing Blue Light Sleep Effects

While we can’t avoid blue light, especially in our digitally driven world, implementing certain lifestyle modifications can significantly mitigate the impact of blue light sleep effects.

Things that emit blue light include fluorescent lights and LED lights. Start with these strategies to get better sleep.

Limit Screen Time Before Bed

Aim to disconnect from your phone, tablet, and computer screens at least 2-3 hours before your target bedtime. This allows your body to naturally wind down melatonin production without interference.

You can also block blue light from your devices. Lenses block blue light, so consider blue-blocking glasses if you must use your devices before bed.

Utilize Blue Light Blocking Glasses or Filters

Consider using blue light-blocking glasses or filters on your electronic devices, especially in the evenings. These glasses and screen protectors filter out blue light wavelengths, minimizing their disruptive impact on your sleep-regulating hormones.

Lenses block blue light, and some people find that they improve performance during the day.

Optimize Your Bedroom for Sleep

Ensure your bedroom is dark, quiet, and cool. Invest in blackout curtains to minimize any outside light pollution and use white noise machines if you are exposed to sound during sleep time.

A cooler room temperature helps regulate your body's temperature, promoting deeper sleep. A dim light before bed can help you get a better night's sleep. Aim for a room temperature around 65 degrees Fahrenheit for optimal sleep conditions.

You can also use a sleep mask to block out excess light.

Get Regular Sunlight Exposure

During the day, maximize your exposure to natural sunlight. This helps regulate your circadian rhythm by promoting healthy melatonin production later in the day. Getting enough sunlight can also improve reaction times.

Consider Using Red Light Bulbs

Using red light bulbs, particularly in your bedroom, can be helpful, especially for evening activities. Red light has the least impact on melatonin production and can even improve sleep quality.

These bulbs emit a warm, soothing light, creating a relaxing environment for better sleep. Dim red lights are best.

Preparing pumpkin mix

Sweet Dreams

Delve into the effects of blue light on sleep quality and how certain foods can help mitigate its impact. Exposure to blue light from screens can disrupt your circadian rhythm, suppressing melatonin production and making it harder to fall asleep.

This disruption not only affects sleep quality but can also weaken the immune system over time. To counteract these effects, it's essential to establish a bedtime routine that minimizes blue light exposure and promotes relaxation.

Enter pumpkin blondies, a delightful and nutritious bedtime treat. Made with pumpkin puree, these blondies are rich in tryptophan, an amino acid that helps boost melatonin production, aiding in better sleep.

Additionally, pumpkin is packed with vitamins and antioxidants that support immune health.

Enjoying a small, wholesome snack like pumpkin blondies before bed can help signal to your body that it's time to wind down while providing the nutrients needed for a strong immune system.

By addressing blue light exposure and incorporating sleep-friendly foods, you can improve your sleep quality and overall health.


Conclusion

Exposure to blue light at night is an often-overlooked but significant factor impacting our sleep quality. The resulting blue light sleep effects extend beyond just feeling tired – it can affect our long-term health and well-being in profound ways.

It can even affect a person's circadian rhythm. But by understanding the science behind it and implementing simple yet effective strategies to manage blue light exposure, we can protect our sleep, health, and overall well-being.


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