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According to researchers, teenagers who sleep less than eight hours a night on
weeknights eat more fatty foods and snacks than their better-rested
peers, particularly if they are girls.
It is unclear why sleeping less might prompt teens to have poorer eating habits,
but it has been shown that getting too little sleep lowers the body's production of the
appetite-regulating hormones leptin and ghrelin, which can make a
person feel hungrier and feel cravings for high-calorie snacks. Over
time, these bad eating habits can lead to weight gain and obesity.