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What’s the Connection Between Blue Light and Sleep. Sleep is one of the pillars of optimal health.
However, people are sleeping much less than they did in the past. Sleep quality has also declined.
Poor sleep is linked to heart disease, type 2 diabetes, depression, and obesity.[sc name=”google” ]
The use of artificial lighting and electronics at night may contribute to sleep problems. These devices emit light of a blue wavelength, which may trick your brain into thinking it’s daytime.
Many studies suggest that blue light in the evening disrupts your brain’s natural sleep-wake cycles, which are crucial for optimal health
This article explains how blocking blue light at night can aid your sleep.
Your body has an internal clock that regulates your circadian rhythm — the 24-hour biological cycle that influences many internal functions.[sc name=”google” ]
Most importantly, it determines when your body is primed for being awake or asleep.
However, your circadian rhythm needs signals from the external environment — most importantly daylight and darkness — to adjust itself.
Blue-wavelength light stimulates sensors in your eyes to send signals to your brain’s internal clock.[sc name=”google” ]
Keep in mind that sunlight and white light contain a mixture of various wavelengths, each of which has a significant amount of blue light.
Getting blue light, especially from the sun, in the daytime helps you stay alert while improving performance and mood.[sc name=”google” ]
Blue light therapy devices may help treat depression, and blue light bulbs have been shown to reduce fatigue and improve the mood, performance, and sleep of office workers.
Yet, modern light bulbs and electronic devices, especially computer monitors, likewise produce large amounts of blue light and may disrupt your internal clock if you’re exposed to them during the evening.[sc name=”google” ]
When it gets dark, your pineal gland secretes the hormone melatonin, which tells your body to get tired and go to sleep.
Blue light, whether from the sun or a laptop, is very effective at inhibiting melatonin production — thus reducing both the quantity and quality of your sleep.[sc name=”google” ]
Studies link melatonin suppression in the evening to various health problems, including metabolic syndrome, obesity, cancer, and depression.[sc name=”google” ]
Blue light in the evening tricks your brain into thinking it’s daytime, which inhibits the production of melatonin and reduces both the quantity and quality of your sleep.