Caffeine causes sleep delays by interfering with the body’s natural surge in the sleep hormone melatonin which pushes back your circadian clock.
Every cell in your entire body, including fat cells, has a natural clock and messing around with it sets you up for a wide array of health problems including obesity and cancer.
Many studies show a relationship between obesity and sleep deprivation.
As powerful as caffeine is, the effect of the blue light coming from our screens has an even greater impact in reducing the melatonin surge. If you have to work, wear glasses with orange-tinted lenses. They offset the impact of the blue light.
But, if you guzzle a double espresso 3 hours before bed you’ll have a tough time falling asleep. You may as well work! Just wear your orange-tinted glasses and power on! Don’t make a habit of it!
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