14 Reasons You're Always Tired
You rely on caffeine to get through the day
Starting your morning with a java jolt is no big dealin fact, studies show that up to three daily cups of coffee is good for youbut using caffeine improperly can seriously disrupt your sleep-wake cycle, says Dr. Towfigh. Caffeine blocks adenosine, the byproduct of active cells that drives you to sleep as it accumulates, he explains. A study published in the Journal of Clinical Sleep Medicine revealed that consuming caffeine even six hours prior to bedtime affects sleep, so cut yourself off by mid-afternoon and watch out for these surprising sources of caffeine.
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