14 Reasons You're Always Tired

Feeling sluggish? Ditching these bad habits that drain your energy will help.
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You check e-mails at bedtime

The glaring light of a tablet, smartphone, or your computer's backlit screen can throw off your body's natural circadian rhythm by suppressing melatonin, a hormone that helps regulate sleep and wake cycles, says Dr. Towfigh. Sensitivity to the digital glow of tech toys can vary from person to person, but in general it's a good idea to avoid all technology for one to two hours before bedtime, he says. Can't avoid checking your device before your head hits the pillow? Then hold it at least 14 inches away from your face to reduce the risk of sleep interference.

Next: You rely on caffeine to get through the day

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